NEC of America 58155 NEC NLite E 155 MB 5.8 GHz Digital Microwave Radio User Manual Part 5

NEC Corporation of America NEC NLite E 155 MB 5.8 GHz Digital Microwave Radio Part 5

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User Manual Part 5

PREVENTIVE MAINTENANCE ROI-S057514-1212 pagesChart 4-2 (Cont’d)Step Procedure9 Click on “RMON(Line)(7days/day)” sub-menu button in “PMON (History)”,Detailed daily Line (LAN) RMON (Remote Network Monitoring) data are displayed.Note: For the GbE INTFC, there are distinctions for the functions from the 10BASE-T/100BASE-Tx, refer to Notes of above “RMON(Line)(24H/15min)”.---RMON(Line)(1day)--- Maintenance Mode: onPort1 Date Time Status 1 2 3 4 5 6 1:2:3:4:5:6:7:8:9:10:11:12:13:14:15:16:17:18:19:20:21:22:RX UNICASTRX BROADCASTRX MULTICASTRX PAUSERX CEC ERRRX ALIGNMENT ERRRX SYMBOL ERRRX UNDERSIZERX FRAGMENTSRX 64RX 65-127RX 128-255RX 256-511RX 512-1023RX 1024-1536RX 1537-MAXRX JABBERSTX UNICASTTX BROADCASTTX MULTICASTTX PAUSETX COLLISION

ROI-S05751 CORRECTIVE MAINTENANCE5-15. CORRECTIVE MAINTENANCECorrective maintenance done in the field is described in this chapter.Corrective maintenance in the field covers fault isolation, module/unit replacement and alignment. The fault location procedures describes how to isolate module-level/unit-level faults. Faults can be classified into those that cause deterioration of the transmission quality and those that interrupt the traffic due to a malfunction of the equipment. This chapter explains the troubleshooting procedures for equipment faults and the corresponding remedial methods. The purpose of troubleshooting malfunctioning equipment is to restart the service by locating the faulty part and replacing it with a spare.The faults that cause deterioration in the transmission quality are primarily originated by changes occurred in the state of propagation. Therefore, if a decline in the transmission quality or similar fault takes place frequently, the link design will have to be reviewed. During the corrective maintenance, carefully observe the precautions given in Chapter 2, until the alignment is completed.5.1 Alarm/StatusWhen an alarm event has occurred, At first, check alarm indication on the front of the IDU. Continuously, connect the PC to the LCT jack on the IDU and check alarm/status indication, Meter Reading on the LCT. (a) Check of the ALM LED Indications and LCT IndicationA faulty part can be located by checking the ALM LED indicatorsand LCT Alarm indications. For the explanation of the ALM LED indication, refer to Chapter 2 OPERATING EQUIPMENT in Section II. Also refer to Chapter 2 Alarm/Status in this Section IV APPENDIX LCT OPERATION.(b) Meter ReadingsBased on the meter readings during periodical inspection with LCT described in Chapter 4, a faulty part can be located by checking if the reading values exceed the permissible ranges.(c) LoopbackIn the case of an abnormal BER measurement result among the meter reading items, try to distinguish the faulty part by Chart 5.1.1 Loopback.

CORRECTIVE MAINTENANCE ROI-S057515-25.1.1 Alarm and StatusThe alarm and status of each module and ODU are displayed. Each items is explained below.ODUTX Power: Indicates the status of the transmitter in the ODU. When the transmission level is decreased 3 dB or more from preset ATPC minimum level, “Alarm” is issued.TX Input: Indicates the status of the ODU input signal from IDU. When the input signal from the IDU is lost, “Alarm” is issued.RX Level: Indicates the status of the received RF signal level of the ODU. When the level decreased below the RX threshold level, “Alarm” is issued.APC: Indicates the status of the synthesizer in the ODU. When any abnormality occurs in the synthesizer, “Alarm” is issued.ODU CPU/Cable Open: Indicates the status of the CPU in the ODU or IF cable, When any abnormality occurs the CPU operation or IF cable is open, “Alarm” issued.Mute Status: Indicates the control status of the ODU TX power output. When the TX power is set to Mute, “On” is issued.LO REF (for XPIC in SONET): Indicates the status of reference LO signal used for V/H signal synchronization. When the reference signal in the ODU is lost, “Alarm” is issued. TX SW Status (for 1+1 configuration): Indicates the TX SW status for the No. 1 or No. 2 CH selection.RX SW Status (for 1+1 configuration): Indicates the RX SW status for the No. 1 or No. 2 CH selection.

ROI-S05751 CORRECTIVE MAINTENANCE5-3MODEMUnequipped: Indicates the status of the MODEM existence. When the MODEM is loose contact or it is not mounted according to the “Equipment Setup”, “Alarm” is issued.Module: Indicates the status of the modulator-demodulator. When a failure occurred in the modulator-demodulator and as a result of a LSI failure, “Alarm” is issued.LOF: Indicates the frame synchronization status. When the synchronization from DMR is lost, “Alarm” is issued,Frame ID: Indicates the status of ID number against MODEM of opposite station or the other channel in Twinpath configuration. When ID number assignment is improper, “Alarm” is issued.High BER: Indicates the quality severe deterioration status between radio sections. When the signal deteriorates below the threshold preset value, “Alarm” is issued. The settable threshold values are: 1E-3, 1E-4 and 1E-5.Low BER: Indicates the quality unsevere deterioration status between radio sections. When the signal deteriorates below the preset threshold value, “Alarm” is issued. The settable threshold values are: 1E-6, 1E-7, 1E-8 and 1E-9.Early Warning: Indicates quality deterioration status. When the signal deteriorates below the preset threshold level, “Alarm” is issued. (When the Early Warning is used for protection switchover in 1+1 configuration, RX Hitless Switch is operated.) The preset threshold level is less than 1E-9.MOD: Indicates the operating status of the MOD. When any failure occurs in the modulator section, “Alarm” is issued.DEM: Indicates the operating status of the DEM. When any failure occurs in the demodulator section, “Alarm” is issued.

CORRECTIVE MAINTENANCE ROI-S057515-4Input Voltage: Indicates the power supply input voltage status. When power supply is exceeding the limited, “Alarm” is issued.Power Supply: Indicates the operating status of the power supply. When power supply is abnormal, “Alarm” is issued.IF Cable Short: Indicates the status of IF cable between IDU and ODU. When a short circuit is caused between ODU and the IDU, “Alarm” is issued.Cable EQL: Indicates the status of IF cable equalizer. When equalizer characteristics control is lost, “Alarm” is issued.XIF (for XPIC in SONET): Indicates the status of XIF input signal of the Main Master IDU and Sub Master IDU. When the XIF input signal is lost, “Alarm” is issued and XPIC function is reset.XPIC Status (for XPIC in SONET): Indicates the status of XPIC operation. When the XPIC function is reset, “Reset” is indicated and the “Reset” LED on the front panel is lit.XREF (for XPIC in SONET): Indicates the status of reference CLK signal used for V/H signal synchronization. When the reference OSC in the MODEM failure occurs, “Alarm” is issued. Linearizer Function: Indicates the status of linearizer function.OPR: When the linearizer function is used.NO OPR:When the linearizer function is not used. In this case, TX output power decreases approx. 4 dBm from a standard value.N/A: When the ODU is used without linearizer function.Linearizer: Indicates the linearizer operating status. When linlearizer operation is improper in OPR condition, “Alarm” is issued.

ROI-S05751 CORRECTIVE MAINTENANCE5-5ATPC Power Mode: Indicates the status of ATPC operation mode. When the ATPC function is improper, stop the control and maintain the TX output level at HOLD/MAX/MIN selectable.INTFC (Main/Sub)INTFC(1/2) Module: Indicates the operating status of the ( ) INTFC. When any failure occurs in the INTFC(1/2) Module, “Alarm” is issued.INTFC(1) Unequipped: Indicates the existence status of the ( ) INTFC. When the ( ) INTFC(1) is not equipped, “Alarm” is issued.INTFC(2) Unequipped (for SONET): Indicates the existence status of the ( ) INTFC. When the ( ) INTFC(2) is not equipped, “Alarm” is issued.INTFC(1/2) Type Mismatch: Indicates the mounted status of the ( ) INTFC. When the INTFC(1/2) type is not coincided with the inventory list, “Alarm” is issued.INTFC(1) In-Phase: Indicates the received signal DADE status between No. 1 and No. 2 at STM/( )E1 INTFC. When the received signal delay time is out of permissible range, Outphase alarm is issued.OC-3(1) LOS (MUX) (for SONET): Indicates the input signal status of the OC-3 from MUX. When the input is disconnected, “Alarm” is issued.OC-3(1) LOF (MUX) (for SONET): Indicates the input signal status of the OC-3 from MUX. When the input signal is out of frame synchronization, “Alarm” is issued.E-BER(1) (MUX) (for SONET): Indicates Excessive-BER of the input OC-3 signal from MUX. When the signal deteriorates below the preset threshold level, “Alarm” is issued. The settable threshold values are 1E-3, 1E-4 and 1E-5.OC-3(1) SD (MUX) (for SONET):

CORRECTIVE MAINTENANCE ROI-S057515-6Indicates the input signal status of the OC-3 from MUX. When the signal deteriorates below the preset threshold level, “Alarm” is issued. The settable threshold values are 1E-6, 1E-7, 1E-8 and 1E-9.OC-3(1) LOS (DMR) (for SONET): Indicates the signal status of the OC-3 from DMR. When the input is disconnected, “Alarm” is issued.

ROI-S05751 CORRECTIVE MAINTENANCE5-7OC-3(1) LOF (DMR) (for SONET): Indicates the status of the input OC-3 signal from DMR. When the input signal is out of synchronization, “Alarm” is issued.OC-3(1) E-BER (DMR) (for SONET): Indicates Excessive-BER of the input OC-3 signal at the Radio side. When the signal deteriorates below the preset threshold level, “Alarm” is issued. The setable threshold values are 1E-3, 1E-4 and 1E-5.OC-3(1) SD (DMR) (for SONET): Indicates the input signal status of the OC-3 from DMR. When the signal deteriorates below the preset threshold level, “Alarm” is issued. The setable threshold values are 1E-6, 1E-7, 1E-8 and 1E-9.OC-3(1) TF (for SONET): Indicates the signal interruption status. Indicates when MS-AIS Generation is set to “Disable”. When OC-3 output signal of OC-3 INTFC is stopped, “Under Execution” is indicated.LAN Link (Port ( )) (LAN INTFC for SONET): Indicates the status of Link between related equipment and Port ( ). Indicates “Link” when the Port is linked with related equipment and indicates “Alarm” in other case.LAN Collision (Port ( )) (LAN INTFC for SONET): Indicates the status of Collision in Half Duplex mode. In Full Duplex mode, “Normal” is always displayed. Indicates status when Port ( ) is in collision condition.Link Loss Forwarding (LLF) (Port ( )) (LAN INTFC for SONET): Indicates the operating status during the fault in opposite station or when the link of local Port ( ) LAN is disconnected by the fault of radio section. When any failure occurs in the MAIN INTFC, “Alarm” is also issued.Speed & Duplex: (Port ( )) (LAN INTFC for SONET): Indicates the operating mode of Port ( ).CTRLCTRL Module: Indicates the operating status of the CTRL. When any failure occurs in the CTRL Module, “Alarm”

CORRECTIVE MAINTENANCE ROI-S057515-8is issued.MMC: Indicates the MMC status. When the mounted MMC is detected, “On” is displayed.APS SW Fail (for APS in SONET): Indicates the APS status of the APS system. When the APS switchover failure occurs, “Alarm” is issued.APS Online Status (for APS in SONET): Indicates online channel on the APS system.XCTRL (for XPIC in SONET): Indicates the status of control signal between Main Master IDU and Sub Master IDU. When the out of control condition occurs, “Alarm” is issued.XPIC Mode Mismatch (for XPIC in SONET): Indicates the status of the Main Master IDU and Sub Master IDU definition. When the Main Master IDU and Sub Master IDU is not defined properly as like as Main Master-Main Master or Sub Master-Sub Master, “Alarm” is issued.

ROI-S05751 CORRECTIVE MAINTENANCE5-95.1.2 Control ItemControl items can be selected only under maintenance mode. As this “Control” is likely to cause disconnection of signal, take care during operation.Details of “Control” item is described as follows:TXSW manual control: Controls manual switchover of the TX SW at the transmitting side in the Hot standby (HS) configuration.RXSW manual control: Controls manual switchover of the RX SW in the 1+1 configuration. The switchover is carried out without traffic interruption when the DADE is In-phase. Adjustment of the delay time of No.1 and No.2 is automatically set.Caution: When the RX SW mode is set to “Forced” in provisioning, RX SW manual control can select either No. 1 or No. 2 RX route though one is alarmed. Then, take care switching to avoid traffic interruption.ATPC manual control: Used when it is required ATPC operation ON/OFF or the change of the transmitting power range in ATPC operation.TX mute: Turns off the transmitter output.CW CONTROL (No.1/2): Used for transmitting a unmodulated carrier wave (CW). Used to confirm the TX frequency stability.APS Manual Control (for APS in SONET): Controls manual switchover (Auto/Working/Protection) of the Optical Line in the APS system.Caution: When the APS Maintenance mode is set to “Forced”in provisioning, APS Manual Control can select either Working or Protection line though one is alarmed. Then, take care switching to avoid traffic interruption.IF loopback: Used for distinguish equipment failure to ODU or IDU. The input traffic signal from MUX is looped back at IF stage. When no abnormality is found in the signal after IF loopback, it is assumed that the ODU has a problem.

CORRECTIVE MAINTENANCE ROI-S057515-10Since the control is not interlocked with the RX SW, the RX SW control is needed to select CH which it is IF looped back in 1+1 configuration.Main Loopback (NEAR END) (for SONET)/Main Loopback (NEAR END) INTFC (1) or (2) (for SONET APS)/: Used for distinguish equipment failure to MUX equipment or radio equipment. The input signal from MUX is looped back to the MUX. When no abnormality is found in the signal with NEAR END loopback, it is assumed that the radio equipment (IDU or ODU) has a problem.Main Loopback (FAR END) (for SONET): Used for distinguish equipment failure to MUX equipment or radio equipment. Signal is looped back at the IDU of the opposite station. When no abnormality is found in the signal through FAR END loopback, it is assumed that the local radio equipment (IDU or ODU) has no problem.Note: This function is unavailable when 2-WAY/XC is enabled.DADE Adjust: Sets the DADE for Hot Standby SD/Twinpath configuration. Selects to make INTFC status In-phase.Notes: 1. The DADE control applies in 1+1 configuration to adjust delay time for RX hitless switching when the INTFC status is indicated Outphase.

ROI-S05751 CORRECTIVE MAINTENANCE5-112. The DADE adjustment is needed in initial lineup or when the IF CABLE is replaced. It is not needed readjustment when the INTFC status is indicated In-phase. LAN Device Reset (for LAN transmission only): Used for reset control to LAN interface Port 1 or Port 2.Linearizer Control: Sets Auto/Forced Reset of linearizer function.Forced Reset: When the linearizer function is not used.Auto: When the linearizer function is used.RF SUB Band select: Used for changing the ODU sub band for radio link depending on the RF frequency assignment.Antenna Alignment Mode: The Antenna Alignment Mode is used for extending the dynamic range of the NLITE E Monitor unit. In order to measure in high range of AGC V, it is mandatory required to set Antenna Alignment Mode to ON. If not it set to ON, the indicated AGC voltage is not guaranteed value.For the antenna orientation, set the TX power to the required level by MTPC mode at the opposite site.Note: It is necessary to set to Antenna Alignment Mode when monitor the RX level with the NLITE E Monitor unit.ALS Restart (for SONET optical interface): Sets the duration that the laser is emitted when ALS manual restart for test is performed.XPIC Control Local (for XPIC in SONET): Resets the XPIC function for Local IDU when propagation is deteriorated, either MODEM or ODU of Main Master or Sub Master is a failure or perform the link test.XPIC Control Remote (for XPIC in SONET): Resets the XPIC function for the IDU in the opposite station when either MODEM or ODU of Main Master or Sub Master in the local station is a failure or perform the link test.

CORRECTIVE MAINTENANCE ROI-S057515-125.1.3 LoopbackWhen loopback condition is necessary, set the system to loopback condition. (see Chart 5-1) When there is an interruption of signals, use the STM/SONET/PDH analyzers and isolate the faulty section by checking the traffic signal by loopback. Setup the test equipment according to the following diagrams for PDH or SONET configuration.N/C(E/O)CONVDEMRXC/N(O/E)CONVMODTXIDUODURECEIVING ENDTXRXMODDEMRSTSTM/SONETANALYZERSTM/SONETANALYZERODUIDUTRANSMITTING ENDMODEM OC-3 INTFCMODEMRSTRSTRSTC/N(O/E)CONVN/C(E/O)CONVOC-3 INTFC(Near End Loopback) (IF Loopback) (Far End Loopback)PCFig. 5-1 Loopback Diagram for Fault Isolation for SONETNote: The IF LOOPBACK and the RX SW is not operated interlock. In 1+1 configuration, The RX SW switching is needed to select the same CH that is testing in IF LOOPBACK. When the RX SW manual control is disable, set it to Forced mode in Provisioning.

ROI-S05751 CORRECTIVE MAINTENANCE5-13Chart 5-1 Loopback ControlStep ProcedureFor the LCT operation, refer to Chapter 6 of LCT Operation in Appendix of this Section IV.This chart contains:A. PreparationB. IF Loopback ControlC. Main Loopback (Near End) Control (SONET)D. Main Loopback (Far End) Control (SONET)If loopback operation is performed, timing loop may occur (timing loop is described in ITU-T Recommendation G.781).Step ProcedureCaution: The Loopback control affects the radio link connection.1. Loopback control operation is not performed at the same time, or perform the Loopback reset control and perform either Loopback mode.• IF Loopback• Near End Loopback• Far End Loopback2. Loopback operation is not performed with an opposite station simultaneously.3. Far End Loopback control will be canceled when radio link failure occurs under the control has been executed.A. PREPARATION1 Set up the BER measurement, (refer to Fig. 5-3)2 Connect the LCT port and the USB port with a USB cable, (see Fig. 2-2 in Chart 2-2)3 Login LCT with User name “Admin” and Admin password,

CORRECTIVE MAINTENANCE ROI-S057515-14Chart 5-1 (Cont’d)Step Procedure4 Click on the “Maintenance” button in “LCT MENU”,LCT MENUAlarm/StatusEquipment SetupInventoryAUX I/OMaintenanceProvisioningMeteringPMON(History)Maintenance1Maintenance25 Click on the “Maintenance1” menu,6 Click on the control button “On” and click “Set” button, to set to Maintenance On mode,7 For 1+1 configuration, switchover the TX SW and RX SW for the channel is to be set loopback, (Refer to Chart 2.3 Manual Switchover Operation)8 Click on the “IF Loopback ( )” button in “Maintenance1” menu and click on the setting button “On”,Note: The control affects Radio link connection. Note:The control applies to IF loopback in local MODEM.9 Click on the “Set” button, 10 Click on the Alarm/Status on LCT MENU to check the status,11 Refer to Fig. 5-7 to 5-9 Troubleshooting Flowchart to diagnose the problem,12 Click on the setting button “Off” of the IF Loopback ( ) and click on the “Set” button, ---Maintenance1---Item Value SettingMaintenance On Off On SetIF Loopback (No.1) On Off On SetIF Loopback (No.2) Off Off On Set

ROI-S05751 CORRECTIVE MAINTENANCE5-15Chart 5-1 (Cont’d)Step ProcedureFor OC-3 (E)13 Click on the setting button “On” and click on the “Set” button, ---Maintenance1---Item Value SettingMaintenance On Off On SetMain Loopback (Near End) On Off On SetMain Loopback (Far End) Off Off On Set

CORRECTIVE MAINTENANCE ROI-S057515-16Chart 5-1 (Cont’d)Step ProcedureFor OC-3 (O) (APS)14 Click on the “Main Loopback (Near End)” button in “Maintenance1” menu, click on the setting button “INTFC ( )” and click on the “Set” button,15 Click on the Alarm/Status on LCT MENU to check the status,16 Refer to Fig. 5-7 to 5-9 Troubleshooting Flowchart to diagnose the problem,17 Click on the setting button “Off” of the Main Loopback (Near End) and click on the “Set” button,18 Click on the setting button of Main Loopback (Far End) in “Maintenance 1” menu and click on the “Set” button,19 Click on the Alarm/Status on LCT MENU to check the status,20 Refer to Fig. 5-7 to 5-9 Troubleshooting Flowchart to diagnose the problem,21 Click on the setting button “Off” of the Main Loopback (Far End),22 Reset control for TX RX SW to “Off”,23 Reset Maintenance mode to “Off”.---Maintenance1---Item Value SettingMaintenance On Off On SetMain Loopback (Near End) INTFC (1) On Off On SetMain Loopback (Near End) INTFC (2) Off Off On SetMain Loopback (Far End) Off Off On Set

ROI-S05751 CORRECTIVE MAINTENANCE5-175.1.4 BER MeasurementChart 5-2 BER MeasurementApparatus:Digital Multimeter with test leadsScrewdriverSONET/SONET Analyzer (for SONET)Optical Variable Attenuator (for OC-3 Optical Interface only)HeadsetStep ProcedureA. 4P LAN INTERFACENote: The BER measurement can not be performed for the channel which is set to Not Used or the channels shared with LAN.TRANSMITTING ENDSELV!AUX/ALMNMS NE SC IN/OUT EOWPROTECTCALL MMCMAINTMEMORYIDUXIF IN XIF OUTIF IN/OUTTXRXRESETXPIC CTRLXPICPWRODUMD/CBL PWRPASOLINK NEOALMLCTPULLSELV!XIF IN XIF OUTIF IN/OUTTXRXRESETXPIC CTRLXPICPWRODUMD/CBL PWRPULLGGGG100M PORT 3 PORT4 100MALM100M PORT 1 PORT 2 100M4P LAN INTFC

CORRECTIVE MAINTENANCE ROI-S057515-18Chart 5-2 (Cont’d)Step Procedure1 At both transmitting and receiving ends, set the BER test set as follows:Note: Operation of the TX SW and RX SW are not required in 1+0 system for the following.2 In HS system, set the TX SW to No.1 or No.2 to “On” condition at transmitting end (refer to Chart 2-3),3 At receiving end, set the RX SW to either No.1 or No.2 to “On” condition,4 Measure BER at required CH and confirm that the values are indicated as follows:Requirement: 1 x 10–12 or less5 At receiving end, change setting of the RX SW to opposite No.1 or No.2 from it in step 5 and confirm that the measured value satisfies requirement as in step 6,6 Change setting of the TX SW to opposite No.1 or No.2 from it in step 4 and confirm that the measured value satisfies requirement given in step 6,7 At receiving end, change setting of the RX SW to opposite No.1 or No.2 from it in step 7 and confirm that the measured value satisfies requirement given in step 6,8 Restore all connections and controls to normal.

ROI-S05751 CORRECTIVE MAINTENANCE5-19Chart 5-2 (Cont’d)Step ProcedureB. OPTICAL INTERFACECaution: To avoid damage to your eyes, do not stare into laser beam or view directly with optical instruments. (Class 1 Laser Product).1 At the transmitting end, disconnect OPT cable from the STM1 IN connector on the OC-3 INTFC (see Fig. 5-2),SELV!AUX/ALMNMS NEALMSC IN/OUT EOWPROTECTCALL MMCMAINTMEMORYIDUXIF IN XIF OUTIF IN/OUTTXRXRESETXPIC CTRLXPICPWRODUMD/CBL PWRPASOLINK NEOLCTOC-3 OUT OC-3 INPULLSELV!XIF IN XIF OUTIF IN/OUTTXRXRESETXPIC CTRLXPICPWRODUMD/CBL PWRPULLONLINEGGGGSTM/SONETANALYZEROC-3 INTFCTRANSMITTING ENDIDUOC-3 (OPT) INSTM/SONETANALYZEROC-3 (OPT) OUTOPTICAL VARIABLE ATTENUATOR *RECEIVING ENDEquipped with OC-3 Optical InterfaceIDUSELV!AUX/ALMNMS NEALMSC IN/OUT EOWPROTECTCALL MMCMAINTMEMORYIDUXIF IN XIF OUTIF IN/OUTTXRXRESETXPIC CTRLXPICPWRODUMD/CBL PWRPASOLINK NEOLCTOC-3 OUT OC-3 INPULLSELV!XIF IN XIF OUTIF IN/OUTTXRXRESETXPIC CTRLXPICPWRODUMD/CBL PWRPULLONLINEGGGG(Blank)(Blank)OC-3 INTFCFig. 5-2 BER Measurement for OC-3 Signal2 At the receiving end, disconnect the OPT cable from the STM1 OUT connector on the OC-3 INTFC (see Fig. 5-2),3 At both transmitting and receiving ends, set the STM/SONET Analyzer as follows:

CORRECTIVE MAINTENANCE ROI-S057515-20Chart 5-2 (Cont’d)Step ProcedureOC-3 INTFC(OPTICAL) • Bit rate : 155.52 Mbps• Code format : OC-3, NRZ• Level S-1.1 L-1.1IN : −8 to −28 dBm/ −10 to −34 dBm OUT : −8 to −15 dBm/ 0 to −8 dBm • Wave lengthIN : 1310 nmOUT : 1310 nmNote: Operation of the TX SW and RX SW are not required in 1+0 system.4 In HS system, set the TX SW to No.1 or No.2 to On condition at transmitting end, (refer to Chart 2-3)5 At receiving end, set the RX SW to either No.1 or No.2 to On condition,6 Measure BER and confirm that the values are indicated as follows:Requirement: 1 x 10–12 or less7 At receiving end, change setting of the RX SW to opposite No.1 or No.2 from it in step 5 and confirm that the measured value satisfies requirement given in step 6,8 Change setting of the TX SW to opposite No.1 or No.2 from it in step 4 and confirm that the measured value satisfies requirement given in step 6,9 At receiving end, change setting of the RX SW to opposite No.1 or No.2 from it in step 7 and confirm that the measured value satisfies requirement given in step 6,10 Restore all connections and controls to normal.

ROI-S05751 CORRECTIVE MAINTENANCE5-215.1.5 Trouble Shooting FlowWhen alarm condition occurs, red alarm LEDs on the IDU are lit except when there is a power supply failure. Faults can be distinguished using the LED indicators on the front panel of the IDU. Connect the LCT to the equipment and check the equipment conditions in according with the flow chart are shown in Fig. 5-3 to Fig. 5-5.Is ODU ALM indicator (red) on the IDU lighted? YES IsIDU ALM indicator (red) on the IDU lighted? NO YES Areboth IDU and ODU ALM indicators (red) flashing?Check the IF cable connection and connectors whether the cable is open or short circuit. YES IsTX power of the ODU is indicated normal? YES IsTX Input indicated normal?The IF cable type, cable length and cable loss are used standard.Change the IF cable to standard.Is TX powervary with ATPC manual control? NOReplace the ODU with a spare. YESReplace the ODU with a spare, if TX power alarm continues when temperature is improved. YES IsAPC of the ODU is indicated normal? NO NO YESReplace the ODU with a spare. NO IsODU CPU is indicated normal? NOReset CPU of the ODU. IsODU ALM is indicated normal? NOCheck the RX section of the ODU. End YES YESConnect the LCT to the IDU and check ALARM/STATUS menu. Check every items whether indicated status is alarm or normal. NO NO YESReplace the ODU with a spare.Is LO REF indicated normal? NO YESReplace the ODU with a spare.Is XREF (MODEM)indicated normal? NO YESCheck the IDU section. For XPICFig. 5-3 ODU TX Section Troubleshooting Flowchart

Is ODU ALM indicator (red) on the IDU lighted? YES NO YES Areboth IDU and ODU ALM indicators (red) flashing?Check the IF cable connection and connectors whether the cable is open or short circuit. Connect the LCT to the IDU and check ALARM STATUS menu. Check every items whether indicated status is Alarm or Normal.IsRX Level indicated Normal?Is RXLEVEL byRSL monitor vary at random interval?Arefrequency value at opposite site and local site correct? NO NO YESCheck fading or interference. YES IsIDU ALM indicator (red) lighted? YES YESIsAPC of the ODU is indicated Normal? IsODU CPU is indicated Normal?Reset CPU of the ODU IsODU ALM is indicated Normal?Replace the ODU with a spare.End YES NO NO YES NOCheck Antenna system or Replace the ODU with a spare.Set proper frequency. NO YES IsODU TX section are checked? YES NO NOCheck the TX section of the ODU. Check the ODU TX section. For XPICCORRECTIVE MAINTENANCE ROI-S057515-22Fig. 5-4 ODU RX Section Troubleshooting Flowchart

Is IDU ALM indicator (red) on the IDU lighted? YES YESIs ODU ALM indicator (red) on the IDU lighted? NO NO Areboth IDU and ODU ALM indicators (red) flashing? Check the IF cable connection and connectors whether the cable is open or short circuit. Connect the LCT to the IDU and check ALARM STATUS menu. Check every items whether indicated status is Alarm or Normal.Connect the SONET Analizer for BER measurement. Select Far End loopback from Control menu in the Maintenance Menu on the LCT.Display ALARM/STATUS items from main menu on the LCT again. YESIsOutput LOS indicatedNormal? IsIF Cable indicatedShort? YES NO A IsIDU indicatedNormal? YES NO A Select IF Loopback from Maintenance1 menu in the Maintenance Menu on the LCT. IsMOD/DEM indicatedNormal? YES NO Replace the MODEM with a spare.IsAIS Generated indicatedNormal? NOCheck associated DTE and cable connection. IsInput LOS indicatedNormal? NO NOIsOutput LOS indicatedNormal? YES NO YES( ) INTFC faulty.Replace the ( ) INTFCCheck associated DTE and cable connection at opposite site. YES Check associated DTE at opposite site. IsAIS or MS-AIS Received indicatedNormal? NO YES Check associated DTE at local site. IsCH Usage indicatedNormal? NO YES Set CH usage correct. IsMOD/DEM indicatedNormal? YES NO Isstatus of LAN INTFC indicatedNormal? NO YES Perform LAN device reset and check LAN cable or associated external equipment. A YES YESIsPWR LED on the MODEM lit?Replace Fuse in the MODEM. NOIs XIF indicated normal? YES IsMOD indicatedNormal? NO NOIs XREF indicated normal? YES YES NOReplace the MODEM with a spare.Check the XIFcable, IDU and ODU of the opposite pol. CH or setting of the opposite station. For XPICROI-S05751 CORRECTIVE MAINTENANCE5-23Fig. 5-5 IDU Section Troubleshooting Flowchart

CORRECTIVE MAINTENANCE ROI-S057515-245.2 ReplacementThe replacement procedures of the IDU and ODU is described below.5.2.1 ODU ReplacementThe procedures for replacing the ODU with a spare are given in the Chart 5-3. The label attached to the side of ODU indicates the ODU type (see Fig 5-6). To replace the ODU, prepare another ODU of the same type as indicated on the label of the failed one.Check the name plate of the spare ODU. When the indicated items are coincided, the ODU can be replaced.Caution: Do not remove/connect the IF cable with the IDU power ON. Turn the IDU power OFF before connecting/disconnecting the IF cable, or equipment may be damaged.Caution: To avoid microfonic properties, occurrence of bit errors, when installing the ODU on the HYB or OMT, protect the ODU from mechanical knocks which is not be replaced.6-38 GHz ODUFGIFLMONRX LEVTRP-( )G-1B0678NLITE ETRP-( )G-1BOUTDOOR UNIT (NHG)SHIFT FREQUENCYMHz SUB BAND(NWA-009034)WEIGHT 3.5kg/ - 48V 0.5ANEC Corporation TOKYO JAPAN MADE IN JAPANCAUTIONNon-ionizingradiation0678-48V INPUTPower down IDU beforedisconnection orconnection of cable.NLITE ETX HIGH/LOWWEIGHT 3.5kg/ - 48V 0.5ANEC Corporation TOKYO JAPAN MADE IN JAPANCAUTIONNon-ionizingradiation-48V INPUTPower down IDU beforedisconnection orconnection of cable.MHz TX FREQUENCYOUTDOOR UNIT (NHG)SHIFT FREQUENCYMHz SUB BANDTX HIGH/LOWSERIAL No. DATESERIAL No. DATE(NWA-009034)NLite EFig. 5-6 ODU Type and Frequency Indication LabelNote: Before replacing the ODU in XPIC, perform the control of XPIC Local and XPIC Remote Reset by the LCT for Main Master or Sub Master channel that is to be used online.The mounting and demounting the ODU from/to antenna, refer to the Installation and Initial Line up in Section III.

ROI-S05751 CORRECTIVE MAINTENANCE5-25Chart 5-3 ODU ReplacementApparatus:T type hexagonal driverStep ProcedureREMOVING1 For 1+1 configuration, switchover the TX SW and RX SW for the standby channel is to be replaced, 2 Turn off the power switch on the MODEM which is connected to the ODU is to be replaced,3 Remove the self-bonding tape from the IF IN/OUT connector,4 Disconnect the IF cable from the IF IN/OUT connector on the ODU,5 Disconnect ground cable from the FG terminal on the ODU,6 Loosen four bolts fixed the ODU with a T type hexagonal driver,FGIFLMONRX LEVSCREWSSCREWSODUIFCABLEGROUNDCABLENLite E7 Remove the ODU from the bracket,

CORRECTIVE MAINTENANCE ROI-S057515-26Chart 5-3 (Cont’d)Step ProcedureMOUNTING8 When the ODU is used for vertical polarization, rotate the ODU so that the plate marked V is on top,V POLARIZATIONPLATE MARKED VUPFGIFLMONRX LEVGuide PinODUNLite ENote: Remove the protection metallic plate covering the waveguide hole on ODU.9 When the ODU is used for horizontal polarization, remove the guide pin fixed on the plate marked V,10 Insert the guide pin removed in step 8 behind of the plate marked H,11 Rotate the ODU so that the plate marked H is on top,PLATE MARKED HUPFGIFLMONRX LEVGuide PinODU H POLARIZATIONNLite E

ROI-S05751 CORRECTIVE MAINTENANCE5-27Chart 5-3 (Cont’d)Step Procedure12 Fit the spare ODU onto the bracket,Note: Be careful not to damage the flange and O-ring.13 Mount the spare ODU onto the bracket and tighten the four screws on the ODU,14 Reconnect the IF cable to the IF IN/OUT connector on the ODU,15 Wrap twice the IF IN/OUT connector with self-bonding tape for waterproofing. (see Fig. 5-7 (1/2) and (2/2))16 Reconnect ground cable removed in step 4 to FG terminal,17 Turn on the power switch on the IDU.

POLEANT6-8 GHz BANDODUODU(*)Note: * These parts should be wrapped by self-bonding tape for waterproof.6-8 GHz BANDself-bonding tapestretchWrap twice the IF IN/OUT connector with self-bonding tape for waterproofing. a half of tape widthODUtwice(*)ODUPOLEANTHYBCORRECTIVE MAINTENANCE ROI-S057515-28Fig. 5-7 Location of Connector for Waterproof (1/2)

IF CABLESELF-BONDING TAPEODUNote: The self-bonding tape should be prepared by customer.SELF-BONDING TAPEODUIF CABLEIN CASE OF L−ANGLEODUCONNECTORself-bonding tapestretchWrap twice the IF IN/OUT connector with self-bonding tape for waterproofing. a half of tape widthODUtwiceThis part should be wrapped by self-bonding tape for waterproof.ROI-S05751 CORRECTIVE MAINTENANCE5-29Fig. 5-7 Location of Connector for Waterproof (2/2)

CORRECTIVE MAINTENANCE ROI-S057515-305.2.2 IDU and Module ReplacementThe procedures for replacing IDU/module with a spare are given in the Chart 5-4.Chart 5-4 IDU and Module ReplacementCaution: Persons performing maintenance must take necessary steps to avoid electro-static discharge which may damage the modules or cause error. Wear a conductive wrist strap connected to the grounded (G) jack on the front of the equipment shelf. This will minimize static build-up during maintenance. (see Fig. 2-1 in Chapter 2).Caution: Do not remove/connect the IF cable with the IDU power ON. Turn the IDU power OFF before connecting/disconnecting the IF cable, or equipment may be damaged.This chart contains: A. Module replacementB. IDU replacementApparatus:Suitable ScrewdriverStep ProcedureA. MODULE REPLACEMENTNote: Be careful do not touch the electric parts and printed circuit on the module.Note: The top surface of the IDU above MODEM is hot in operation.Note: The maintenance personnel should report starting replacement from a station to the relevant station.1 Referring to Chart 2-1, set the IDU to maintenance ON condition by LCT,2 For 1+1 configuration, switchover the TX SW and RX SW for the standby channel from the working channel which is to be replaced,

ROI-S05751 CORRECTIVE MAINTENANCE5-31Chart 5-4 (Cont’d)Step ProcedureRemoving MODEM3 When the MODEM will be replaced, turn off the power switch on the corresponding MODEM which is to be replaced,4 Disconnect cables as following order,(1) Disconnect power supply cable from SELV connector.(2) Disconnect IF cable from IF IN/OUT connector. The adapter is reused.(3) Disconnect ground cable from the ground terminal.5 Loosen two screws on the MODEM module, (See Fig. 5-8)6 Remove the MODEM module from the IDU shelf,Mounting MODEM1 When the MODEM is replaced, check that the power switch is set to Off position,2 Align the MODEM to the shelf, then push it in until the multipin connector firmly fits,3 Tighten the two screws on the module,4 Connect cables as following order,(1) Connect ground cable to the ground terminal.(2) Connect IF cable with adapter to IF IN/OUT connector.(3) Connect power supply cable to SELV connector.5 Turn on the power switch on the MODEM,6 Check that the MODEM is normal on the Alarm/Status display, 7 Check that the installed MODEM module exists in the INVENTRY list,8 Check the operation of the replaced MODEM module,9 Referring to Chart 2-1, set the IDU to maintenance OFF condition by LCT.

CORRECTIVE MAINTENANCE ROI-S057515-32Chart 5-4 (Cont’d)Step ProcedureReplacement of the OC-3 (Optical) INTFC in APSCaution: Do not stare at the laser beam or look at it directly with optical instruments. Otherwise, it may hurt your eyes (Class 1 Laser Product)For the OC-3 (OPTICAL) INTFC replacement in APS configuration, the OC-3 (OPTICAL) INTFC can be replaced without power OFF and not affect traffic when doing replacement as following order. (When the traffic is not applied to the system, turn off the power switch before performing the replacement of the module.). The maintenance personnel should report starting replacement from a station to the relevant station.1 Referring to Chart 2-1, set the IDU to maintenance ON condition by LCT,2 Click on “APS Manual Control” from “Maintenance 1” menu,3 Switchover the module is to be replaced to OFF LINE. Click on the “Working” or “Protection” button and click on the “Set” button, then, value turns to selected side for ON LINE, 4 Check that the “ON LINE” LED is unlit on the OC-3 (OPTICAL) INTFC which is to be replaced,5 Set the PROTECT SW on the module front to ON (for upper position), then the MAINT LED starts the blink, The module can be replaced under the MAINT LED is blinking,(a) There is need to install the MMC. The MEMORY LED blinks during the data is uploading to the MMC, the MAINT LED starts the blink after upload of the data has been completed.(b) When the CTRL becomes the PROTECT mode, LCT connection takes timeout.6 Disconnect optical cables from OC-3 OUT and OC-3 IN connectors on the OC-3 (OPTICAL) INTFC module is to be replaced, ---Maintenance1---Item Value SettingMaintenance On Off On SetAPS Manual Control Working Auto Working Protection Set

ROI-S05751 CORRECTIVE MAINTENANCE5-33Chart 5-4 (Cont’d)Step Procedure7 Loosen two screws on the OC-3 (OPTICAL) INTFC module is to be replaced, (See Fig. 5-11)8 Extract the OC-3 (OPTICAL) INTFC module from the IDU shelf,Note: Be careful not catch the module on the cable when extracting the module. If the module caught on the live cables, it may be caused radio link error.9 Install the spare OC-3 (OPTICAL) INTFC module into the IDU shelf, 10 Connect the OPT cables to the OC-3 OUT and OC-3 IN connectors on the OC-3 (OPTICAL) INTFC module,11 Set the PROTECT SW on the module front to OFF (for lower position), then the MAINT LED turns to lit, When the PROTECT SW turns to OFF, it will appear momentary that events have been latched. 12 Check that the OC-3(1) and OC-3(2) are normal on the Alarm/Status display, 13 Check that the installed OC-3 (OPTICAL) INTFC module exists in the INVENTRY list,14 Check the operation of the replaced OC-3 (OPTICAL) INTFC module,15 Click on the “Auto” button and click on the “Set” button, then, value turns to Auto,16 Click on the “Off” button of Maintenance and Click on the “Set” button,17 This work finishes.

CORRECTIVE MAINTENANCE ROI-S057515-34Chart 5-4 (Cont’d)Step ProcedureSystem Upgrade for APS of OC-3 (OPTICAL) INTFC Caution: To avoid eye damage, do not stare at the laser beam or look at it directly with optical instruments. (Class 1 Laser Product)For the change of OC-3 (OPTICAL) INTFC system to the APS system, perform system setup without power OFF and not affect traffic when doing replacement as following order. The maintenance personnel should report starting replacement from a station to the relevant station.1 Referring to Chart 2-1, set the IDU to maintenance ON condition by LCT,2 Click on the “Equipment Setup” button in “LCT MENU”, then “Equipment Setup” menu is displayed,3 Select “OC-3 OPT for APS” from pull-down menu of the SUB(PROT),4 Click on the “Available” setting button of the APS Function,5 Click on the “SET” button in Common area, then “OK” is displayed in Progress area when the setup is properly executed, ---Equipment Setup---User Interface SONET OC-3Redundancy Setting 1+1(Hot Standby TERM)INTFC (Main) OC-3(OPTICAL)INTFC (Prot) OC-3 OPT for APSXPIC Usage Not Used Used(Main Master) Used(Sub Master)APS Function Unavailable AvailableModulation Scheme 128QAMTransmission Capacity 156MB

ROI-S05751 CORRECTIVE MAINTENANCE5-35Chart 5-4 (Cont’d)Step Procedure6 Click on the Provisioning button on “LCT MENU”,7 Click on the “Forced” control button of the APS Maintenance Mode item, 8 Click on the “SET” button in Common area, then “OK” is displayed in Progress area when the setup is properly executed,9 In the Maintenance1 menu, Click on the “Working” button of the APS Manual Control and Click on the “Set” button, then, value turns to “Working”, 10 Remove the blank cover of the Slot2 for OC-3 INTFC(2),11 Install the OC-3 (OPTICAL) INTFC module into the Slot2,12 Tighten two screws of the OC-3 (OPTICAL) INTFC module, (See Fig. 5-11)13 Connect the OPT cables to the OC-3 OUT and OC-3 IN connectors on the OC-3 (OPTICAL) INTFC module,14 Check that the OC-3(1) and OC-3(2) are normal on the Alarm/Status display, 15 Check that the installed OC-3 (OPTICAL) INTFC module exists in the INVENTRY list,16 Check the operation of the installed OC-3 (OPTICAL) INTFC module,17 Click on the “Auto” button and Click on the “Set” button, then, value turns to Auto,18 Click on the “Off” button of Maintenance and Click on the “Set” button,19 This work finishes.----Condition for APS---APS Maintenance Mode Manual Forced---Maintenance1---Item Value SettingMaintenance On Off On SetAPS Manual Control Working Auto Working Protection Set

CORRECTIVE MAINTENANCE ROI-S057515-36Chart 5-4 (Cont’d)Step ProcedureSystem Change from e/w APS to w/o APS of OC-3 (OPTICAL) INTFC Caution: Do not stare at the laser beam or look at it directly with optical instruments. Otherwise, it may hurt your eyes (Class 1 Laser Product).For the change of OC-3 (OPTICAL) INTFC system of the APS system to without APS system, perform system setup without power OFF and not affect traffic when doing system change as following order. The maintenance personnel should report starting system change from a station to the relevant station.1 Referring to Chart 2-1, set the IDU to maintenance ON condition by LCT,2 In the Maintenance1 menu, Click on the “Working” button of the APS Manual Control and Click on the “Set” button, when the Protection side is ON LINE, value turns to “Working”, 3 Click on the “Auto” button of the APS Manual Control and Click on the “Set” button, When the Working side is ON LINE, check that the APS Manual Control is “Auto” mode, 4 Click on the “Equipment Setup” button in “LCT MENU”, then “Equipment Setup” menu is displayed,5 Select “Not Used” from pull-down menu of the SUB(PROT),6 Click on the “Unavailable” setting button of the APS Function,---Maintenance1---Item Value SettingMaintenance On Off On SetAPS Manual Control Working Auto Working Protection Set---Maintenance1---Item Value SettingMaintenance On Off On SetAPS Manual Control Auto Auto Working Protection Set

ROI-S05751 CORRECTIVE MAINTENANCE5-37Chart 5-4 (Cont’d)Step Procedure7 Click on the “SET” button in Common area, then “OK” is displayed in Progress area when the setup is properly executed,8 Perform step 8 to step 11 when it is needed, 9 Disconnect optical cables from OC-3 OUT and OC-3 IN connectors on the OC-3 (OPTICAL) INTFC module in the Slot2,10 Loosen two screws on the OC-3 (OPTICAL) INTFC module is to be replaced, (See Fig. 5-11)11 Extract the OC-3 (OPT) INTFC module from the Slot2, Note: Be careful not catch the module on the cable when extracting the module. If the module caught on the live cables, it may be caused radio link error.12 Fit the blank cover with two screws to the Slot2,13 Click on the “Off” button of Maintenance and click on the “Set” button,---Equipment Setup---User Interface SONET OC-3Redundancy Setting 1+1(Hot Standby TERM)INTFC (Main) OC-3(OPTICAL)INTFC (Prot) Not UsedXPIC Usage Not Used Used(Main Master) Used(Sub Master)APS Function Unavailable AvailableModulation Scheme 128QAMTransmission Capacity 156MB

CORRECTIVE MAINTENANCE ROI-S057515-38Chart 5-4 (Cont’d)Step ProcedureRemoving OC-3 INTFC, GbE INTFC, CTRL1 Referring to Chart 2-1, set the IDU to maintenance ON condition by LCT,Note: When the CTRL is a failure, replace it with a spare as explained below.Note: When the CTRL is replaced without power OFF, refer to the “Replacing the CTRL Used MMC or LCT”. 2 Turn off the power switch on the MODEM (both MODEM for 1+1 configuration),3 Disconnect all the cables connected to the module,4 Loosen two screws on the module, (See Fig. 5-11),5 Extract the module,Note: Be careful to avoid catching the module on the cable when extracting the module. If the module is caught on the live cables, it may cause a radio link error. ---Maintenance1---Item Value SettingMaintenance On Off On Set

1+0 SYSTEM1+1 SYSTEM IDUSELV!AUX/ALMLCT NMS NE SC IN/OUT EOWPROTECTCALL MMCMAINTMEMORYIDUXIF IN XIF OUTIF IN/OUTTXRXRESETXPIC CTRLXPICPWRODUMD/CBL PWRnlite eFGFGPULLSELV!XIF IN XIF OUTIF IN/OUTTXRXRESETXPIC CTRLXPICPWRODUMD/CBL PWRPULLSCREWSCREWSCREW IDUSCREWSCREWMODEM Gb E INTFCCTRLMODEM No. 1MODEM No. 2 CTRLGb E INTFCW/O APS SYSTEM IDUSELV!AUX/ALMNMS NEALMSC IN/OUT EOWPROTECTCALL MMCMAINTMEMORYIDUXIF IN XIF OUTIF IN/OUTTXRXRESETXPIC CTRLXPICPWRODUMD/CBL PWRnlite eLCTOC-3 OUT OC-3 INPULLSELV!XIF IN XIF OUTIF IN/OUTTXRXRESETXPIC CTRLXPICPWRODUMD/CBL PWRPULLONLINEGGGG(Blank Cover)Slot2SCREWSELV!AUX/ALMNMS NEALMSC IN/OUT EOWPROTECTCALL MMCMAINTMEMORYIDUXIF IN XIF OUTIF IN/OUTTXRXRESETXPIC CTRLXPICPWRODUMD/CBL PWRnlite eLCTOC-3 OUT OC-3 INPULLSELV!XIF IN XIF OUTIF IN/OUTTXRXRESETXPIC CTRLXPICPWRODUMD/CBL PWRPULLALMOC-3 OUT OC-3 INONLINE ONLINEGGGGOC-3 (OPTICAL) INTFC OC-3 (OPTICAL) INTFCSCREWE/W APS SYSTEMOC-3 (OPTICAL) INTFCSELV!AUX/ALMNMS NE SC IN/OUT EOWPROTECTCALL MMCMAINTMEMORYIDUXIF IN XIF OUTIF IN/OUTTXRXRESETXPIC CTRLXPICPWRODUMD/CBL PWRnlite eLCTOC-3 OUT OC-3 INPULLSELV!XIF IN XIF OUTIF IN/OUTTXRXRESETXPIC CTRLXPICPWRODUMD/CBL PWRPULLGGGG(Blank Cover)OC-3 OUT OC-3 IN(Blank Cover)ROI-S05751 CORRECTIVE MAINTENANCE5-39Fig. 5-8 Demounting and Remounting Module

CORRECTIVE MAINTENANCE ROI-S057515-40Chart 5-4 (Cont’d)Step ProcedureMounting OC-3 (OPTICAL) INTFC w/o APSFor the OC-3 (OPTICAL) INTFC mounting without APS, install the module as following order,1 Referring to Chart 2-1, set the IDU to maintenance ON condition by LCT, 2 Turn OFF the power switch on the MODEM,3 Align the OC-3 (OPTICAL) INTFC to the shelf, then push it in until the multipin connector firmly fits,4 Tighten the two screws on the module,5 Connect optical cables to OC-3 OUT and OC-3 IN connectors, Caution: Do not stare at the laser beam or look at it directly with optical instruments. Otherwise, it may hurt your eyes (Class 1 Laser Product).6 Turn ON the power switch on the MODEM,7 Check that the “ON LINE” LED is lit on the OC-3 (OPTICAL) INTFC which is replaced,8 Check that the OC-3(1) is normal on the Alarm/Status display, 9 Check that the installed OC-3 (OPTICAL) INTFC module exists in the INVENTRY list,10 Check the operation of the installed OC-3 (OPTICAL) INTFC module,11 Click on the “Off” button of Maintenance and Click on the “Set” button, 12 This work finishes.---Maintenance1---Item Value SettingMaintenance On Off On Set---Maintenance1---Item Value SettingMaintenance Off Off On Set

ROI-S05751 CORRECTIVE MAINTENANCE5-41Chart 5-4 (Cont’d)Step ProcedureMounting GbE (OPTICAL) INTFC For the GbE (OPTICAL) INTFC mounting, install the module as following order,1 Referring to Chart 2-1, set the IDU to maintenance ON condition by LCT, 2 Turn OFF the power switch on the MODEM,3 Align the GbE (OPTICAL) INTFC to the shelf, then push it in until the multipin connector firmly fits,4 Tighten the two screws on the module,5 Connect optical cables to 1000BASE-SX OUT and IN connectors, Caution: Do not stare at the laser beam or look at it directly with optical instruments. Otherwise, it may hurt your eyes (Class 1 Laser Product).6 Turn ON the power switch on the MODEM,7 Check that the “ON LINE” LED is lit on the GbE (OPTICAL) INTFC which is replaced,8 Check that the OC-3(1) is normal on the Alarm/Status display, 9 Check that the installed GbE (OPTICAL) INTFC module exists in the INVENTRY list,10 Check the operation of the installed GbE (OPTICAL) INTFC module,11 Click on the “Off” button of Maintenance and Click on the “Set” button, ---Maintenance1---Item Value SettingMaintenance On Off On Set---Maintenance1---Item Value SettingMaintenance Off Off On Set

CORRECTIVE MAINTENANCE ROI-S057515-42Step ProcedureOC-3/GbE INTFC, CTRL1 Referring to Chart 2-1, set the IDU to maintenance ON condition by LCT, 2 Turn OFF the power switch on the MODEM,3 Check that the switch on the MODEM (both MODEM for 1+1 configuration) is off position,4 Align the module to the IDU shelf, then push it in until the multipin connector firmly fits,5 Tighten two screws on the module,6 Connect all cables to the module,7 Turn on the power switch on the MODEM.8 Check that the 4P LAN INTFC, OC-3, GbE INTFC, CTRL is normal on the Alarm/Status display, 9 Check that the installed 4P LAN INTFC, OC-3, GbE INTFC, CTRL module exists in the INVENTRY list,10 Check the operation of the replaced 4P LAN INTFC, OC-3, GbE INTFC, CTRL module,11 Click on the “Off” button of Maintenance and click on the “Set” button, ---Maintenance1---Item Value SettingMaintenance On Off On Set---Maintenance1---Item Value SettingMaintenance Off Off On Set

ROI-S05751 CORRECTIVE MAINTENANCE5-43Chart 5-4 (Cont’d)Step ProcedureReplacing the CTRL Using the MMC or LCT.This procedure explains how to replace the CTRL using the MMC or LCT. This procedure is applied when the CTRL is not failed, or when the equipment configuration data are saved into the MMC or LCT/PNMx. Note: If the NMS parameters (Network Config.) can not be restored, then the resetup with the PNMx is required. The Use of the MMC for the CTRL ReplacementWhen the MMC is used, the replacement can be performed without the LCT operation.(The resetup with the PNMx for the Network Config. is necessary.)1 Insert the MMC into the MMC slot on the CTRL front, (The data size to save is approximately 10 kbyte.)2 Set the PROTECT SW on the CTRL front to ON position (for upper side). Then, the MAINT LED (amber) on the IDU is lit and the equipment configuration data gather up and the saving of data to the MMC start, 3 When the equipment configuration data gather up and data saving to the MMC has been completed, the MAINT LED on the IDU blinks slowly, (Check that the MAINT LED blinks slowly when remove the CTRL.)4 Remove the cables connected to the CTRL, loosen two fixed screws and remove the CTRL,Note: Be careful not catch the module on the cable when extracting the module. If the module caught on the live cables, it may be caused radio link error.5 Prepare the spare CTRL. Set the PROTECT SW on the spare CTRL to ON position (for upper side), (The PROTECT SW setting distinguish the normal start up or protected start up.) Mount the CTRL into the IDU. Check that the MAINT LED on the IDU blinks. Tighten two screws and connect cables removed in step 4.

CORRECTIVE MAINTENANCE ROI-S057515-44Chart 5-4 (Cont’d)Step Procedure6 When the MAINT LED blinks, insert the MMC into the MMC slot on the CTRL front, which has equipment configuration data used in the former CTRL, 7 The download of the equipment configuration data start, the deployment is performed. When the CTRL has been made provision, MAINT LED on the IDU turns to light. Check that the MAINT LED lights and set the PROTECT SW to OFF position (for lower side). Then, the equipment configuration data deploys and data is restored.8 In the Equipment Setup menu and the Provisioning menu, confirm that the equipment configuration and setting conditions are the same as before replacement. Check that neither alarm is indicated in the Alarm Status. 9 The CTRL replacement finishes. Perform the resetup for the Network Config. since the Network Config. data is not restored.AUX/ALMLCT NMS NE SC IN/OUT EOWPROTECTCALL MMCMAINTMEMORYIDUPASOLINK NEOMAINTE LEDMMC SlotMPROTECT SWCTRLMMCSCREWSCREW

ROI-S05751 CORRECTIVE MAINTENANCE5-45Chart 5-4 (Cont’d)Step ProcedureNote: If the NMS parameters (Network Config.) can not be restored, then the resetup with the PNMx is required. The Use of the LCT for the CTRL ReplacementWhen the LCT is used, the replacement can be performed without the MMC. (The resetup with the PNMx for the Network Config. is necessary.)1 Referring to Chart 2-1, set the IDU to Maintenance ON condition by LCT (Check that the MAINT LED lights.),2 Set the PROTECT SW on the CTRL front to ON position (for upper side). Then, equipment configuration data gather up and the saving of data start, --- Maintenance2 --- ---Control---CPU Reset---Download---Configuration FileProgram FileEquipment Config. File---Upload---Configuration FileEquipment Config. File---Date/Time---Date/Time Setting---Password---Password Setting---PMON Clear---PMON Clear3 Select the Maintenance2 from the Maintenance menu, select the Equipment Config. File of Upload. Enter the directory of the file name where the uploaded file will be saved (extension is .cfg),4 When the upload to the LCT has completed, MAINT LED blinks slowly (Check that the MAINT LED blinks slowly when remove the CTRL.),

CORRECTIVE MAINTENANCE ROI-S057515-46Chart 5-4 (Cont’d)Step Procedure5 Remove the cables connected to the CTRL, loosen two fixed screws and remove the CTRL,Note: Be careful to avoid catching the module on the cable when extracting the module. If the module is caught on the live cables, it may cause a radio link error.6 Prepare the spare CTRL. Set the PROTECT SW on the spare CTRL to ON position (for upper side), (The PROTECT SW setting distinguish the normal start up or protected start up.) Mount the CTRL into the IDU. Check that the MAINT LED on the IDU blinks. Tighten two screws and connect cables removed,7 To download the equipment configuration data to the LCT, select Maintenance2 from the Maintenance menu, select the Equipment Config. File of Download. Enter the directory of the file name where the uploaded file is saved, click on the “Execute” button to start the download. When “Complete” appears in the Progress Status, click on the “Update” button to perform download. 8 When the CTRL has been provisioned, the MAINT LED on the IDU turns to light. Check that the MAINT LED lights, set the PROTECT SW to OFF position (for lower side). Then, the equipment configuration data deploys and data is restored.9 In the Equipment Setup menu and the Provisioning menu, confirm that the equipment configuration and setting conditions are the same as before replacement. Check that neither alarm is indicated in the Alarm Status.10 The CTRL replacement finishes. Perform the resetup for the Network Config. since the Network Config. data is not restored.

ROI-S05751 CORRECTIVE MAINTENANCE5-47Chart 5-4 (Cont’d)Step ProcedureReplacing the DC-DC CONV (Optional).When the power is supplied to the SELV of the DC-DC CONV (optional) but the PWR LED of the DC-DC CONV is not lit though the power switch is on, before replacing the DC-DC CONV, check the conduction of the fuse in the DC-DC CONV.1 Referring to Chart 2-1, set the IDU to maintenance ON condition by LCT,2 Set the power switch on the MODEM to Off position,3 Set the power switch on the DC-DC CONV to Off position,FGFGSELV!XIF IN XIF OUTIF IN/OUTTXRXRESETXPIC CTRLXPICPWRODUMD/CBL PWRPULLAUX/ALMNMS NE SC IN/OUT EOWPROTECTCALL MMCMAINTMEMORYIDUNLITE ELCTPWR SwitchSELVPWR LED−43V/OUTGScrewScrewSELVPWR PULLPWRALM FUSE (250V/8AH)− 43VGOUTSTDGPWR SwitchPWR LEDALMALMOC-3 INOC-3 OUTALMOC-3 INOC-3 OUT ONLINEONLINE4 Disconnect cables connected to the DC-DC CONV as following order,(1) Disconnect power supply cable from SELV connector,(2) Disconnect power supply cable from −43/OUT connector,(3) Disconnect ground cable from ground terminal,(4) Disconnect ALM cable from ALM terminal,5 Loosen two screws fixed the DC-DC CONV, 6 Extract the DC-DC CONV from the IDU shelf,7 Check that the power switch on the spare DC-DC CONV is Off position8 Mount the spare DC-DC CONV to the IDU shelf,9 Tighten two screws to fix the DC-DC CONV,10 Connect cables to the DC-DC CONV as reversed order in step 4,

CORRECTIVE MAINTENANCE ROI-S057515-48Chart 5-4 (Cont’d)Step Procedure11 Turn on the power switch on the DC-DC CONV,12 Check that PWR LED on the DC-DC CONV is on,13 Turn on the power switch on the MODEM,14 Check that PWR LED on the MODEM is on,15 Check that ALM LED on the IDU is unlited,16 Set the IDU to maintenance OFF condition by LCT.

ROI-S05751 CORRECTIVE MAINTENANCE5-49Chart 5-4 (Cont’d)Step ProcedureB. IDU REPLACEMENTREMOVING1 Turn off the power switch on the MODEM (both MODEM in 1+1 configuration),2 Disconnect the IF cable, signal cables and the power cable, etc. as following order,(1) Disconnect XPIC CTRL cables from opposite IDU. (XPIC configuration only.)(2) Disconnect XIF coaxial cables from opposite IDU. (XPIC configuration only.)(3) Disconnect OC-3, LAN, Aux. signal cables from connector.(4) Disconnect power supply cable from SELV connector.(5) Disconnect IF cable from IF IN/OUT connector.(6) Disconnect ground cable from the ground terminalNote: The adapter for IF cable connector is reused.3 As shown in Fig. 5-9, loosen four screws and remove the IDU,MOUNTING4 Fix the two brackets to desired position on the IDU, if necessary (see Fig. 5-10),5 Mount the IDU into the original position of the mounting rack and tighten the four screws,6 Reconnect the IF cables, signal cables and the power cable to the original position as following order,(1) Connect ground cable to the ground terminal(2) Connect IF cable (with adapter) to IF IN/OUT connector.(3) Connect power supply cable to SELV connector.(4) Connect OC-3, LAN, Aux. signal cables to proper connector.(5) Connect XIF coaxial cables to opposite IDU. (XPIC configuration only.)(6) Connect XPIC CTRL cables to opposite IDU. (XPIC configuration only.)

CORRECTIVE MAINTENANCE ROI-S057515-50Chart 5-4 (Cont’d)Step Procedure7 Form the wiring, and fix the cables using cable binder to the mounting rack,Notes: 1. Do not cross the cables on front of indicators and power switch used for maintenance.2. Take suitable radius to wiring the IF cable. (e.g. 10D-FB: 70 cm)8 Turn on the power switch on the IDU.SCREWNote: Weight 4 kg.Hot SurfaceCaution: The top surface of the IDU above MODEM is hot in operation.Fig. 5-9 Demounting and RemountingFRONT POSITIONCENTER POSITIONSIDE VIEW Fig. 5-10 Bracket Mounting Position

ROI-S05751 CORRECTIVE MAINTENANCE5-515.2.3 Fuse ReplacementWhen the power is supplied to the SELV but the IDU can not be powered on with the power switch, check the conduction of fuse in the MODEM.Chart 5-5 Fuse ReplacementStep Procedure1 Set the power switch on the MODEM which is not powered to Off position,2 Disconnect cables connected to the MODEM as following order,(1) Disconnect power supply cable from SELV connector.(2) Disconnect IF cable from IF IN/OUT connector. The adapter is reused.(3) Disconnect ground cable from the ground terminal.3 Loosen two screws on the MODEM, 4 Extract the MODEM from the IDU shelf,5 Remove protection cap over the fuse (see Fig. 5-11),6 Remove the fuse from the fuse holder,7 Check conduction of the broken fuse using tester, 8 Check conduction of the reserved fuse using tester, 9 Replace the broken fuse with reserved one,10 Set the replaced fuse to the fuse holder,11 Cap over the replaced fuse,12 Mount the MODEM to the IDU shelf,13 Tighten two screws on the MODEM,14 Connect cables to the MODEM as reversed order in step 2,15 Turn on the power switch on the MODEM,16 Check that power is on.

Reserve Fuse (6.3A)21606.3 FuseRKS-F91000-0107(Front)Fuse Cap(MODEM)RESERVECORRECTIVE MAINTENANCE ROI-S057515-52Fig. 5-11 Fuse in the MODEM

ROI-S05751 CORRECTIVE MAINTENANCE5-53When the power is supplied to the SELV of the DC-DC CONV (optional) but the PWR LED of the DC-DC CONV is not lit though the power switch is on, check the conduction of the fuse in the DC-DC CONV.Chart 5-6 DC-DC CONV Fuse ReplacementStep Procedure1 Set the power switch on the DC-DC CONV which is not powered to Off position 2 Disconnect cables connected to the DC-DC CONV as following order,(1) Disconnect power supply cable from SELV connector,(2) Disconnect power supply cable from −43/OUT connector,(3) Disconnect ground cable from ground terminal,(4) Disconnect ALM cable from ALM terminal,3 Loosen two screws on the DC-DC CONV, 4 Extract the DC-DC CONV from the unit,5 Put the screwdriver to the groove of the fuse holder and turns the fuse holder counter clockwise,6 Remove the fuse from the fuse holder,7 Check conduction of the broken fuse using tester,8 Remove the reserved fuse as described in step 5,9 Check conduction of the reserved fuse using tester, 10 Replace the broken fuse with reserved one,11 Set the replaced fuse to the fuse holder,12 Put the screwdriver to the groove of the fuse holder and push it into the DC-DC CONV,13 Turn the screwdriver clockwise until the fuse holder is locked up, (When the fuse holder is locked up, the groove of the fuse holder is set to horizontal as shown in Fig 5-12.)14 Check and replace another fuse in the same way as from Step 5 to Step 13,15 Mount the DC-DC CONV to the unit,

CORRECTIVE MAINTENANCE ROI-S057515-54Chart 5-6 (Cont’d)Step Procedure16 Tighten two screws on the DC-DC CONV,17 Connect cables to the DC-DC CONV as reversed order in step 2,18 Turn on the power switch on the DC-DC CONV,19 Check that power is on.20 Turn on the power switch on the IDU/DC-DC CONV UNIT,21 Check that power is on.Reserve Fuse (8A)GAB250V8 FuseCBE-006255-001(Front)Fuse HolderRESERVE RESERVECAUTIONHOT SURFACEAvoid contact.!Reserved FuseSELVPWR PULLPWRALM FUSE (250V/8AH)− 43VGOUTSTDGPWR SwitchSELVPWR LEDALM−43V/OUTGScrewScrew(DC-DC CONV)Fig. 5-12 Fuse in the DC-DC CONV

ROI-S05749-05FE CONTENTSAugust, 2007CL-1NEC NLite E6-38 GHz SONET DIGITAL RADIO SYSTEMSection II OPERATIONCONTENTSTITLE PAGE1 GENERAL ••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••1-12 OPERATING EQUIPMENT •••••••••••••••••••••••••••••••••••••••••2-12.1 IDU Shelf ••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••2-42.2 CTRL •••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••2-52.3 MODEM •••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 2-122.4 STM-1 INTFC ••••••••••••••••••••••••••••••••••••••••••••••••••••• 2-162.5 4P LAN INTFC (Optional) ••••••••••••••••••••••••••••••••••••• 2-182.6 GbE INTFC (Optional) •••••••••••••••••••••••••••••••••••••••••• 2-202.7 DC-DC CONV (Optional) •••••••••••••••••••••••••••••••••••••• 2-232.8 ODU ••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 2-253 SYSTEM SETUP •••••••••••••••••••••••••••••••••••••••••••••••••••••• 3-13.1 Equipment Setup •••••••••••••••••••••••••••••••••••••••••••••••••3-13.2 Provisioning Setup ••••••••••••••••••••••••••••••••••••••••••••••• 3-43.3 Events and Performance •••••••••••••••••••••••••••••••••••••••3-73.4 Control ••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 3-143.5 Setup Description •••••••••••••••••••••••••••••••••••••••••••••• 3-163.5.1 Automatic Laser Shutdown Control (OPT INTFC) (SDH) ••••••••••••••••••••••••••••••••••••••••••••• 3-163.5.2 Automatic Protection Switching (APS) (OPT INTFC Optional APS Configuration) (SDH) ••••••• 3-183.5.3 Automatic Transmitter Power Control •••••••••••••••••••• 3-233.5.4 Loopback Control •••••••••••••••••••••••••••••••••••••••••••••• 3-273.5.5 Link Loss Forwarding Control (LAN) •••••••••••••••••••••• 3-273.5.6 MS-AIS Generation (SDH) •••••••••••••••••••••••••••••••••••• 3-283.5.7 Cross Polarization Interference Canceller (XPIC Reset Control •••••••••••••••••••••••••••••••••••••••••••••••••••• 3-303.5.8 Network Management (Optional) ••••••••••••••••••••••••••• 3-31

CONTENTS ROI-S05749CL-22 pages3.5.9 Functionality Classification ••••••••••••••••••••••••••••••••• 3-323.6 Protection Switching •••••••••••••••••••••••••••••••••••••••••• 3-333.6.1 1 + 1 Twin-path System ••••••••••••••••••••••••••••••••••••••• 3-333.6.2 Hot-standby System ••••••••••••••••••••••••••••••••••••••••••• 3-333.6.3 Switchover Control ••••••••••••••••••••••••••••••••••••••••••••• 3-34TITLE PAGE

ROI-S05749-05FE CONTENTSAugust, 2007CL-3

ROI-S05749 GENERAL1-11. GENERALThis section provides instructions for operation of the 6 to 38 GHz SONET microwave radio system.This section describes interface terminals and jacks, controls, indicators, and test jacks. Use of the LCT is required for local operation, monitoring, control and setup. For details of system and provisioning setup, refer to Section IV NLite E LCT Manual.

TRP-( )G-1B0678NEC NLite ETRP-( )G-1BOUTDOOR UNIT (NHG)SHIFT FREQUENCYMHz SUB BAND(NWA-009034)WEIGHT 3.5kg/ - 48V 0.5ANEC Corporation TOKYO JAPAN MADE IN JAPANCAUTIONNon-ionizingradiation0678-48V INPUTPower down IDU beforedisconnection orconnection of cable.NEC NLite ETX HIGH/LOWWEIGHT 3.5kg/ - 48V 0.5ANEC Corporation TOKYO JAPAN MADE IN JAPANCAUTIONNon-ionizingradiation-48V INPUTPower down IDU beforedisconnection orconnection of cable.MHz TX FREQUENCYOUTDOOR UNIT (NHG)SHIFT FREQUENCYMHz SUB BANDTX HIGH/LOWSERIAL No. DATESERIAL No. DATE(NWA-009034)NEC NLite E IDU 1+1IDU 1+0MDP-150MB-1AAWEIGHT: 4 kg (WITH OPTION)SER. No. DATE , INDOOR UNIT−48 V 2.5A (WITH ODU & OPTION)NEC Corporation TOKYO JAPAN MADE IN JAPAN(H2930)0678MODEM(1) INTFC (1) INTFC (2)MODEM(2) CTRLSELV!AUX/ALMNMS NE SC IN/OUT EOWPROTECTCALL MMCMAINTMEMORYIDUXIF IN XIF OUTIF IN/OUTTXRXRESETXPIC CTRLXPICPWRODUMD/CBLPULLPWRPASOLINK NEOLCTEquipped with LAN Interface for Main LAN (SONET)GGALMWS IN/OUT100M PORT 1 PORT 2 100MWS(Blank)M S.GSELV!AUX/ALMNMS NEALMSC IN/OUT EOWPROTECTCALL MMCMAINTMEMORYIDUXIF IN XIF OUTIF IN/OUTTXRXRESETXPIC CTRLXPICPWRODUMD/CBL PWRNLite E NEOLCTOC-3 INOC-3 OUTPULLALMOC-3 INOC-3 OUT(Blank)ONLINEONLINEGGGSELV!AUX/ALMNMS NEALMSC IN/OUT EOWPROTECTCALL MMCMAINTMEMORYIDUXIF IN XIF OUTIF IN/OUTTXRXRESETXPIC CTRLXPICPWRODUMD/CBL PWRNLite E NEOLCTOC-3 OUT OC-3 INPULLSELV!XIF IN XIF OUTIF IN/OUTTXRXRESETXPIC CTRLXPICPWRODUMD/CBL PWRPULLALMOC-3 OUT OC-3 INONLINE ONLINEGGGGGENERAL ROI-S057491-22 pages

ROI-S05749 OPERATING EQUIPMENT2-12. OPERATING EQUIPMENTThe indicators, switches, interface terminals and jacks for wiring with the associated equipment are described here.The IDU component modules listed in Table 2-1 are plugged-in from front of the IDU shelf as shown in Fig. 2-1.The component modules of the ODU shown in Fig. 2-2 are listed in Table 2-2.Note: Use shielded cables which are connected to the RJ-45 connectors to suppress interference from affecting the signal and to reduce electromagnetic radiation which may interfere with other signal cables.Note:Twist power cables (+)/(−) to suppress inductive interference signals.

12 4, or 5 5*6G1263SELV!XIF IN XIF OUTIF IN/OUTTXRXRESETXPIC CTRLXPICPWRODUMD/CBL PWRPULLSELV!XIF IN XIF OUTIF IN/OUTTXRXRESETXPIC CTRLXPICPWRODUMD/CBL PWRPULLAUX/ALMNMS NE SC IN/OUT EOWPROTECTCALL MMCMAINTMEMORYIDUPASOLINK NEOLCTAUX/ALMNMS NE SC IN/OUT EOWPROTECTCALL MMCMAINTMEMORYIDUPASOLI NK NEOLCTGGGGGOPERATING EQUIPMENT ROI-S057492-2 Table 2-1 IDU COMPOSITIONNo. UNIT/MODULE NAMEH2930 MDP-150MB-1AAREMARKSExpandable 1 + 0 system 1 + 1 system1MODEM (X) (X) 32QAM/128QAM *12MODEM −(X) 32QAM/128QAM *1DC-DC CONV (√)−-20 to -60/+20 to +60 VDC *23LAN INTFC (√)4-Port-LAN (for SONET) *34GbE INTFC (√)GbE (for SONET)5OC-3 INTFC (√)OC-3 *3 for APS6CTRL (X)Notes: 1. (X) always equipped.2. (√) optionally equipped.*1 selectable in setting program.*2 for expanding power supply range.*3 for optional APS Fig. 2-1 IDU Composition

6 - 38 GHz ODUFGIFLMONRX LEVNLite EROI-S05749 OPERATING EQUIPMENT2-3 Table 2-2 ODU COMPOSITIONMODULEName *TRP-( )G-1B6 GHz 7 GHz) 8 GHz 10 GHz 11 GHz 18 GHz 23 GHz 26 GHz 38 GHzNWA-009024( )NWA-009026( )NWA-009028( )NWA-009030( )NWA-009032( )NWA- 009038( )NWA-009040( )NWA- 009042( )NWA- 009048( )1RF CKT H2202( ) H2203( ) H2204( ) H2225( ) H2205( ) H2229( ) H2230( ) H2231( ) H2234( )2IF CKT —3PS —Note: Component modules are enclosed in the ODU case.Fig. 2-2 ODU Composition

OPERATING EQUIPMENT ROI-S057492-42.1 IDU ShelfGGGG Jack (IDU)GElectrostatic Discharge (ESD) jack used to connect wrist strap band.*Caution*:Engineers for maintenance of the equipment must take the necessary steps to avoid bit errors or cause damage to the modules due to electrostatic discharge. Wear a conductive wrist strap connected to the ground jack (G) on the front of the IDU to minimize static build-up during maintenance.

ROI-S05749 OPERATING EQUIPMENT2-52.2 CTRLAUX/ALMNMS NE SC IN/OUT EOWPROTECTCALL MMCMAINTMEMORYIDUPASOLINK NEOLCTMAINT(amber)MEMORY(amber)IDU(red)CALLPROTECTSC IN/OUTAUX/ALMNENMSLCTMMCEOWThe CTRL generates various control signals based upon LCT setup data and gathered operating status in the IDU and from the ODU, has SC, EOW, LAN, NE, EXT ALM, HK, Cluster ALM signals interface. By Connecting a PC, manual control, performance monitoring and system setup can be performed. Interface Signals (CTRL)AUX/ALM (D-Sub Female 44 pins) Input/Output SignalEOW: 1 CHFrequency: 0.3 to 3.4 kHz (1020 Hz (Test Tone))Level: −6 dBmImpedance: 600 ohmsALM: ALM 6 outputs/6 HK Inputs/ 4 HK Control outputs, Cluster 4 Inputs/outputsOutput: Relay contact Form-CInput: PhotocouplerBz 1,2 IN: Signalling control extension input.Call 1,2 OUT: Signalling control extension output.EOW: EOW headphone jack

OPERATING EQUIPMENT ROI-S057492-6SC IN/OUT (D-Sub Female 44 pins) Input/Output SignalNE2: Network ElementLevel: RS-485DSC (RS-232C): 2 CHBit rate: 9600 bpsLevel: RS-232CDSC (V.11): 2 CHBit rate: 64 KbpsLevel: V. 11Impedance: 100 ohmsNE (RJ-45): Network ElementLevel: 10 Base-TLCT (USB): Serial interface USB-B type connector with PCNMS (RJ-45): PNMSLevel: 10 Base-TIndicators (CTRL)LED Indication RemarksMAINT Maintenance mode can be selected by LCT, PNMT and PNMS “The maintenance Mode “ON” is selected”.Actively blinks: In progress of program data download.Inactively blinks:Protect Mode for CTRL replacement in effect.MEMORY Memory Card (MMC) status. ON: Enable access to Memory CardOFF: Disable access to Memory CardBlinks: Accessing Memory CardIDU IDU Summary alarm. Check ALM LEDs on each module to find the cause and/or connect LCT to check the performance condition. Blinks: CPU or peripheral event occurred.Interface Signals (CTRL)

Switch (CTRL)Switch Operating RemarksCALL Transmits EOW calling signal to sound the buzzer in the opposite station.PROTECT Prevent service interruption when the CTRL module is replaced.Accessing the Memory Card (MMC) is required to apply the function.ROI-S05749 OPERATING EQUIPMENT2-7User Interface Pin Assignment (CTRL)Terminal DescriptionCTRLALM/AUX IN/OUT(D-sub Female, 44 Pins)Service channel data input/outputPins 1 (+) and 16 (–) EOW input 1Pins 2 (+) and 17 (–) EOW output 1Pins 3 (+) and 18 (–) EOW input 2Pins 4 (+) and 19 (–) EOW output 2Pin 5 GroundPins 25 (COM), 40 (NC) and 11 (NO) ⎯ RL1*1Maintenance alarm outputBetween BetweenPins 25 and 40 Pins 25 and 11Normal state : Closed OpenAlarm state : Open ClosedPins 24 (COM), 39 (NC) and 10 (NO) ⎯ RL2*1IDU CPU/PS1/PS2 alarm outputBetween BetweenPins 24 and 39 Pins 24 and 10Normal state : Closed OpenAlarm state : Open ClosedPins 23 (COM), 38 (NC) and 9 (NO) ⎯ RL3ODU1/ODU2 alarm output*2Between BetweenPins 23 and 38 Pins 23 and 9Normal state : Closed OpenAlarm/Event state : Open Closed

OPERATING EQUIPMENT ROI-S057492-8Pins 22 (COM), 37 (NC) and 8 (NO) ⎯ RL4ODU CPU1/ODU CPU2/Cable Open alarm output*2Between BetweenPins 22 and 37 Pins 22 and 8Normal state : Closed OpenAlarm/Event state : Open ClosedPins 21 (COM), 36 (NC) and 7 (NO) ⎯ RL5IDU total alarm output*2Between BetweenPins 21 and 36 Pins 21 and 7Normal state : Closed OpenAlarm/Event state : Open ClosedPins 20 (COM), 35 (NC) and 6 (NO) ⎯ RL6High BER1/High BER2 alarm output*2Between BetweenPins 20 and 35 Pins 20 and 6Normal state : Closed OpenAlarm/Event state : Open ClosedPins 15 (+) and 14 (−)HK1 alarm input*3Normal state : OpenControl/Event state : ClosedPins 13 (+) and 12 (−)HK2 alarm input*3 Normal state : OpenControl/Event state : ClosedPins 29 (+) and 28 (−)HK3/Cluster4 alarm input*3Normal state : OpenControl/Event state : ClosedPins 27 (+) and 26 (−)HK4/Cluster3 alarm input*3 Normal state : OpenControl/Event state : ClosedPins 44 (+) and 43 (−)HK5/Cluster2 alarm input*3Normal state : OpenControl/Event state : ClosedPins 42 (+) and 41 (−)HK6/Cluster1 alarm input*3 Normal state : OpenControl/Event state : ClosedPin 30 Buzzer input 1Pin 31 Call output 1Pin 32 Buzzer input 2Pin 33 Call output 2User Interface Pin Assignment (CTRL)Terminal Description

ROI-S05749 OPERATING EQUIPMENT2-9CTRLSC IN/OUT(D-sub Female, 44 Pins)NE2/DSC Service channel data input/outputPins 1 (+) and 2 (–) NE2 TXD Pin 3 GroundPins 4 (+) and 5 (–) V.11-1 TX data input Pins 6 (+) and 7 (–) V.11-1 RX data outputPins 8 (+) and 9 (–) V.11-2 TX data inputPins 10 (+) and 11 (–) V.11-2 RX data outputPins 12 and 13 (G) RS-232C-1 data inputPins 14 and 15 (G) RS-232C-2 data inputPin 16 NE2 RXD TERMPins 17, 18 GroundPins 19 (+) and 20 (–) V.11-1 TX clock input (co-dir.) or output (contra-dir.) *4Pins 21 (+) and 22 (–) V.11-1 RX clock outputPins 23 (+) and 24 (–) V.11-2 TX clock input (co-dir.) or output (contra-dir.) 4*Pins 25 (+) and 26 (–) V.11-2 RX clock outputPins 27, 28, 29 GroundPins 30 (+) and 31 (–) NE2 RXDPin 32 GroundPins 33 (+) and 34 (–) V.11-1 TX frame pulse input (co-dir.) or output (contra-dir.) *4Pins 35 (+) and 36 (–) V.11-1 RX frame pulse outputPins 37 (+) and 38 (–) V.11-2 TX frame pulse input (co-dir.) or output (contra-dir.) *4Pins 39 (+) and 40 (–) V.11-2 RX frame pulse outputPins 41 and 42 (G) RS-232C-1 data outputPins 43 and 44 (G) RS-232C-2 data outputUser Interface Pin Assignment (CTRL)Terminal Description

OPERATING EQUIPMENT ROI-S057492-10Notes: *1: RL1 (Maintenance) and RL2 (IDU CPU/PS1/PS2 ALM OUTUT) are fixed and can not be changed to other items. The relay contact is rated at 0.2 A.*2: These alarm items are assigned at the factory (default setting) and can be changed by the LCT as shown in Table 2-3 in Section 1 (Alarms may be selectively assigned to RL3 to RL6).*3: Photocoupler interface; resistance of open input terminal is more than 200 kilo ohms. Closed input terminal is less than 50 ohms. *4: V11 interface for the TX clock and frame pulse input/output depend on co-/contra-directional mode setting in the LCT provisioning menu.LCT(USB connector type B)Local craft terminal (LCT) data input/outputPin 1 VbusPins 2 (–) and 3 (+) DPin 4 GroundNMS (RJ-45) PNMS data (10Base-T) input/outputPins 1 (+) and 2 (–) NMS TXDPins 3 (+) and 6 (–) NMS RXDPins 4, 5, 7 and 8 Not ConnectedNE (RJ-45) NE data (10Base-T) input/outputPins 1 (+) and 2 (–) NMS TXDPins 3 (+) and 6 (–) NMS RXDPins 4, 5, 7 and 8 Not ConnectedUser Interface Pin Assignment (CTRL)Terminal Description

EOW 4W RIDU Dir. AALM/AUX IN/OUT(D-Sub, 44 Pins)EOW ConnectionWhen EOW signal is connected between two IDUs, perform wiring as follows.11623417181930313233IDU Dir. CALM/AUX IN/OUT(D-Sub, 44 Pins)IDU Dir. BALM/AUX IN/OUT(D-Sub, 44 Pins)Back -to- Back Station BTerminal Station A1162341718193031323311623417181930313233EOW 4W SBuzzer INCall OUTEOW ExtensionEOW 4W SEOW 4W RBuzzer INCall OUTROI-S05749 OPERATING EQUIPMENT2-11

OPERATING EQUIPMENT ROI-S057492-122.3 MODEMSELV!XIF IN XIF OUTIF IN/OUTTXRXRESETXPIC CTRLXPICPWRODUMD/CBLPULLPWRSELVPWRPWR(green)ODU(red)MD/CBL(red)TX (green)RX (green)XPIC RESET(amber)XPIC CTRLXIF OUTXIF INIF IN/OUTGCaution: Do not apply to the equipment a voltage that varies sharply. The equipment operation may be impaired.Caution: Do not remove/connect the IF cable with the IDU power ON, Turn the IDU power OFF before connecting/disconnecting the IF cable, or equipment may cause damaged.Caution: Do not insert/extract the MODEM with the power ON, turn the IDU power OFF and remove all cables connected to the MODEM before insert/extract the MODEM, or MODEM may be damaged.Caution: The top surface of the IDU shelf above MODEM is hot in operation.The MODEM provides the 32QAM/128QAM Modulation/Demodulation for, 10/100Base T(x)/1000 Base T (LAN) or OC-3 (SONET) data transmission and following main functions.- Forward Error Correction using RS/Interleave- BER (High BER/Low BER) detection/indication/release for internal and external- Reducing ODU output signal distortion using BB Linearizer - Equalization using Transversal Equalizer- XPIC ODU synthesizer synchronization control- Interfered signal from opposite polarization cancellation (XPIC) - IDU/ODU power supply- System power on/off

ROI-S05749 OPERATING EQUIPMENT2-13 Interface Signals (MODEM)IF IN/OUT (TNC Female) TX Frequency: 340 MHzRX Frequency: 140 MHzPower supply: −48 VImpedance: 50 ohmsConnecting IF Cable length:5D-FB: less than 150 m 8D-FB: less than 300 m 10D-FB: less than 350 mG (Screw): Ground terminal(5 mm square cable (more than 2.5 mm diameter cable) (AWG#10) is recommended to apply for the frame ground. The proper press fix terminal tool shall be used.)SELV (Molex M5569-04A1, 4 pins) (DC IN)Input Voltage: −48 V DC (negative), + (positive, ground)XIF IN/XIF OUT(Receptacle IEC 169-13 (1.0/2.3))Only used for XPIC system between two IDUsXIF IN: IF signal of opposite polarization input. (connect to XIF OUT of the other MODEM)XIF OUT: IF signal for opposite polarization output. (connect to XIF IN of the other MODEM)Frequency: 140 MHzImpedance: 75 ohmsXPIC CTRL (D-Sub 15 pins, Serial Port) Only used for XPIC system between two IDUs (connect to XPIC CTRL of the other MODEM)Automatic/Remote XPIC reset control signal interface between mutual MODEM.

Indicators (MODEM)LED Indication RemarksPWR The PWR switch of the MODEM is turned on.DC power is supplied to the ODU also.ODUTransmit RF power of the ODU decreased approx. −3 dB from preadjusted ATPC minimum (MIN) level in provisioning.Check Metering using LCT for local and/or opposite site in Maintenance menuReceiver input level of the ODU falls below squelch level.APC loop of local oscillator in ODU is unlocked.IF signal from the MODEM to ODU is lost.Blinks when IF cable is open circuit.Connected ODU is not matched with inventory.MD/CBL Blinks when IF cable is short circuit.TX (only 1+1) Selected status of ODU TX When TX mute control: LED Off RX (only 1+1) Selected status of MODEM RX output signal When RX SWO switched to opposite: LED Off XPIC RESET XPIC function is OFF condition Only XPIC configuration.Propagation condition deteriorated or XPIC is reset from LCT control. Switches (MODEM)Switch Operating RemarksPWR IDU and ODU power On/Off switch. Refer to Start-up and Shut-down the Equipment in Maintenance SectionOPERATING EQUIPMENT ROI-S057492-14

User Interface Pin Assignment (MODEM)Terminal DescriptionSELVSELV (DC IN)(Molex M5569-04A1 Connector, 4 Pins)−48 V DC power inputNote: Only −48 V (−40.5 to −57 V) is available.Pins 1 and 3 GroundPins 2 and 4 −48 VIF IN/OUT TNC Jack (Female) * IF signal IN/OUT and PS OUT to the ODUXPIC CTRL(D-Sub Female, 15 pins) Used for interconnection between IDUs in XPIC configuration.Pins 1 (+) and 6 (–) XPIC SV TXDPins 2 (+) and 7 (–) XPIC SV RXDPin 3 GroundPins 4 (+) and 9 (–) XPIC SEL INPins 5 (+) and 10 (–) XPIC SEL OUTPins 8 (+) and 12 (–) XPIC RESET INPin 11 GroundPins 13 (–) and 14 (+) XPIC RESET OUTPin 15 GroundROI-S05749 OPERATING EQUIPMENT2-15Note: * It is recommended that TNC (Male) L-angle connector for the 8D-FB IF cable is used to connect it to the IDU. When the N (Male) straight connector is attached to the 5D-FB or 10D-FB IF cable, use of the TNC (Male) - N (Female) (NJ-TNCP-LA) L-angle adapter is needed.

OPERATING EQUIPMENT ROI-S057492-162.4 OC-3 OPTICAL INTFCALMSTM-1 INSTM-1 OUTALM (red)ONLINE(green)STM-1 INSTM-1 OUTONLINESTM-1 (OPT) INTFCCaution: Do not insert/extract the OC-3 INTFC with the power ON. Turn OFF the PWR switch on the MODEM and remove all cables connected to the OC-3 INTFC before inserting/extracting theOC-3 INTFC, or that INTFC may be damaged.The OC-3 INTFC provides an optical signal interface only. The module performs the following functions:- Coded Mark Inversion (CMI) to Non Return to Zero (NRZ) conversion- Optical to Electrical conversion- RSOH termination- Stuffing control- Hitless switching (for 1+1 configuration)- Performance monitoring (conforms to G.826/G.828)- Automatic Laser Shut Down (ALS)- Near End/Far End loopback

Interface Signals (OC-3 INTFC)OC-3 IN/OUT LCOptical OC-3 Input/Output, G.957OpticalType: G. 9 5 7Bit Rate: 155.520 MbpsLevel: L-1.1: 0 to −8 dBm (TX)/−10 to −34 dBm (RX)S-1.1: −8 to −15 dBm (TX)/−8 to −28 dBm (RX)Code: NRZWavelength:1310 nmIndicators (OC-3 INTFC)LED Indication RemarksALMLOSS of OC-3 from MUX is detected. Check MUX and wiring.Frame synchronization of input OC-3 signal from MUX is lost.Check MUX and wiring.BER (E-BER, DMR or MUX) is worse than preset value (10-3 to 10-5, selectable). Check RSL, Interference and TX power at opposite site when BER ALM occurs.BER (SD, DMR or MUX) is worse than preset value (10-5 to 10-9, selectable).Frame synchronization of input OC-3 signal from radio is lost.Check OC-3 transmission at the opposite site, ODU or MODEM in local.Mounting module is not matched with inventory.Change LCT setting or other ( )INTFC module.ONLINE Online status of Working/Standby in APS: ON Offline status of Working/Standby in APS: OFF Online status of Working w/o APS: ONROI-S05749 OPERATING EQUIPMENT2-17

OPERATING EQUIPMENT ROI-S057492-182.5 4P LAN INTFC4P LAN 4P LAN INTFCPORT1PORT2100M PORT 3 PORT4 100MALM100M PORT 1 PORT 2 100MPORT3PORT4ALM LED(red)The 4P LAN INTFC (optional) is installed into the Main-INTFC slot (Slot1) in the system configuration and it provides 4 Port LAN Fast Ethernet interfaces. The LAN interface is used 4 Port shared (P1-P4) mode, 2 Port (P1-P2/P3-P4) shared mode or separated (P1/P2/P3/P4) mode.Separated P1-P4 SharedP1-P2 Shared P3-P4 SharedDisabledEnabledSwitchingP1 P2 P3 P4(1) (2) (3)(4) (5)Dir-AP1 P2 P3 P4Dir-ADir-A Dir-AP1 P2 P3 P4P1 P2 P3 P4P1 P2 P3 P4Dir-A

User Interface Signals (4P LAN INTFC)LAN PORT1 to PORT4 (RJ-45)LAN interface Port 1, Port 2, Port 3 and Port 4.Selectable 2 Mbps to 100 Mbps CH is assigned for LAN. Input/Output Signal: 10/100Base-T(x) Auto-sensing or fixedFlow control: Full duplex or Half duplexForwarding mode: Store-and-ForwardingROI-S05749 OPERATING EQUIPMENT2-19Indicators (4P LAN INTFC)LED Indication Remarks100M LAN signal is in 100BASE-TX mode.LINK LAN and associated equipment are linked and flashing under the exchanging the packet.COLLISION/DUPLEXInput/Output LAN signal is in Full Duplex mode. Flashing when a collision condition occurs.ALMThe module is extracted. Mount the module.Mounting module is not matched with inventory.Change LCT setting or other ( )INTFC module.LAN link failure occurs. Check LAN cable connection.Module failure occurs. Replace the module with a spare.

OPERATING EQUIPMENT ROI-S057492-202.6 GbE INTFCALMOUT1000BASE-SXPORTIN1000BASE-SX 1000BASE-TINDICATORThe GbE INTFC (optional) provides 1000BASE-SX/1000BASE-T interface. The GbE INTFC is installed into the Main-INTFC slot (Slot1)instead of the OC-3 INTFC in the SONET (128 QAM) system configuration. The signal is connected either SFP (for 1000BASE-SX) or RJ-45 (for 1000MASE-T).These bytes (E1/F1/DCCr) are available between radio links. The RMON for LINE side is available but DMR side is unavailable. The maximum passed packet size is 9600 bytes.The GbE INTFC ia applicable together with the LAN INTFC.User Interface Signals (GbE INTFC)1000BASE-SX: Gigabit Ether signal, Optical Interface1000BASE-SX IN:1000BASE-SX OUT: (SFP Optical Interface Connector)Ether signal Input Ether signal OutputSpeed & Duplex: 1000 Mbits Full Duplex/Auto Negotiation fixedFlow control: Flow control ON or OFF selectableLink Loss Forwarding:Disabled/Enabled selectable1000BASE-T: Gigabit Ether signal, Electrical Interface1000BASE-T Port: (RJ-45 Interface Connector)Ether signal Input/Output Speed & Duplex: 1000 Mbits Full Duplex/Auto Negotiation fixedFlow control: Flow control ON or OFF selectableLink Loss Forwarding:Disabled/Enabled selectable

User Interface Pin Assignment (GbE INTFC)Terminal Description1000BASE-SX(SFP Fiber connector)Multimode Fiber/LC ConnectorIN (Right side) 1000BASE-SX InputOUT (Left side) 1000BASE-SX Output1000BASE-T(RJ-45, 8 pins)1000BASE-T Input/Output (MDI/MDI-X)Pin 1 DATA-A+/ DATA-B+Pin 2 DATA-A−/ DATA-B−Pin 3 DATA-B+/ DATA-A+ Pin 4 DATA-C+/ DATA-D+ Pin 5 DATA-C−/ DATA-D−Pin 6 DATA-B−/ DATA-A+Pin 7 DATA-D+/ DATA-C+Pin 8 DATA-D−/ DATA-C−Note: Cable connector: CAT5e/RJ-45ROI-S05749 OPERATING EQUIPMENT2-21

Indicators (GbE INTFC)LED Indication RemarksIndicator Indicates which Port is applied to the signal interface.When the indicator is flashing slowly, the input signal is off in the corresponding interface port which is set to be used.When the indicator is flashing fast, the input/output signal is on in the corresponding interface port which is set to be used.When the indicator is lit steady, the signal is linked in the corresponding interface port which is set to be used.When the indicator is unlit, the corresponding interface which port is set to no use.ALMThe module is extracted. Mount the module.Mounting module is not matched with inventory.Change LCT setting or other ( )INTFC module.Module failure occurs. Replace the module with a spare.LOS from DMR is detected. Check IDU/ODU and radio link.LOF from DMR is detected. Excessive-BER alarm condition from DMR occurs.SD from DMR is detected. GbE output signal for fiber cable is interrupted. Replace the module with a spare. (SFP mode only)LAN link failure occurs. Check LAN cable connection.OPERATING EQUIPMENT ROI-S057492-22

ROI-S05749 OPERATING EQUIPMENT2-232.7 DC-DC CONVSELVPWR PULLPWRALM FUSE (250V/8AH)− 43VGOUTSTD+PWR LED(green)FUSE (250V/8AH)DC-DC CONVCaution: Do not apply to the equipment a voltage that varies sharply. The equipment operation may be impaired.Caution: Do not remove/connect the power supply cable with the PWR switch ON, Turn the PWR switch OFF before connecting/disconnecting the power supply cable IN or OUT, if not, module may be damaged.PWR SELVALM − 43V OUTGNote: If the PWR LED is not lit though the PWR switch has set to ON, set the PWR switch to OFF, remove two fuses from the module and check the conduction of them.The DC-DC CONV (optional) converts 20 to 60 V or −20 to −60 V DC input to −43 V stable DC voltage. The module applies when the Nlite E +ODU is connected to the IDU.Interface Signals (DC-DC CONV)SELV (Molex M5569-04A1, 4 pins) (DC IN)Input Voltage: −20 to −60 V/+20 to +60 V DC−43V OUT(Molex M5569-02A1, 2 pins) (DC OUT)Output: −43 V/1.6AG (Screw): Ground terminal(5 mm square cable (more than 2.5 mm diameter cable) (AWG#10) is recommended to apply for the frame ground. The proper press fix terminal tool shall be used.)ALM: Power supply ALM signal output

Indicators (DC-DC CONV)LED Indication RemarksPWR The PWR switch of the DC-DC CONV is turned on.Switches (DC-DC CONV)Switch Operating RemarksPWR IDU and ODU power on/off switch. Refer to Start-up and Shut-down the Equipment in Maintenance SectionUser Interface Pin Assignment (DC-DC CONV)Terminal DescriptionSELVSELV (DC IN)(Molex M5569-04A1 Connector, 4 Pins)−20 to −60/20 to 60 V DC power inputPins 1 and 3 0 V /(or +20 to +60 V)Pins 2 and 4 −20 to −60 V/(or 0 V)−43V OUT (Molex M5569-02A1, 2 pins) (DC OUT)−43 V DC power output (connects to the SELV connector of the MODEM module using accessory cable)Pin 1 GroundPin 2 −43 VALM Power supply ALM signal output(D-Sub Female, 9 pins)Pins 6 (COM), 1 (NC) and 2 (NO)PS and input voltage alarm outputBetween BetweenPins 1 and 6 Pins 6 and 2Normal state : Closed OpenAlarm state : Open ClosedPin 9 GroundPins3,4,5,7,8 No connectedOPERATING EQUIPMENT ROI-S057492-24

ROI-S05749 OPERATING EQUIPMENT2-252.8 ODUFGIFLMONRX LEVIFL (IF IN/ OUT)RX LEV MONFG (Frame Ground) Antenna Direct Mounting TypeRF IN/OUT(REAR VIEW)RF IN/OUT(REAR VIEW)(FRONT VIEW)Coaxial Cable Type (6/7/8 GHz)(REAR VIEW)RF IN/OUTWG Type (6/7/8 GHz)NLite EThe ODU receives 340 MHz IF signal from the IDU and converts it to an RF signal using a local signal generated by a synthesized local oscillator. This RF signal is then sent to the antenna through the BPF which limits the RF transmit signal dispersion. The TX output level is controlled to the specified from the IDU corresponded to the QPSK 32QAM or 128QAM modulation. The RF signal received from the antenna is amplified to the required level. Afterward the signal is converted into the 140 MHz IF signal by mixing with a local signal generated by a synthesized local oscillator. Then the 140 MHz IF signal is sent to the IDU through the IF cable.

OPERATING EQUIPMENT ROI-S057492-26 Interface Signals (ODU)IFL (N Female)TX Frequency 340 MHzRX Frequency: 140 MHzPower supply: −48 VImpedance: 50 ohmsConnecting IF Cable length:5D-FB: less than 150 m 8D-FB: less than 300 m 10D-FB: less than 350 mFG (Screw) Frame ground, connecting near by ground point.RF IN/OUT RF signal interface.- N female connector for the 6/7/8 GHz ODU with coaxial cable connection.- NEC proprietary flange for the 10 to 38 GHz ODU with antenna mounting (direct/OMT/HYB COMB/TX ATT).- Waveguide connection flange; 6 GHz: PDR70 7/8 GHz: PDR84 10/11 GHz: PDR100 18/23 GHz: PBR220 38 GHz: PBR320 Monitoring Terminal (ODU)Terminal Operating RemarksRX LEV MON: Monitoring RX LEV in AGC voltage using the digital voltmeter or PASOLINK MONITOR unit * for antenna orientation.Use LCT to check the RX LEV in Maintenance.Note*:In order to measure exact performance of AGC V at the RX LEV MON, it is mandatory required to set Antenna Alignment Mode to ON as the AGC voltage indication is not guaranteed outside Antenna Alignment Mode.It is necessary to set to Antenna Alignment Mode every time monitor the RX level with the NLite E MONITOR unit.

ROI-S05749 SYSTEM SETUP3-13. SYSTEM SETUPThis section provides system setup to make up proper system configuration. The setup is performed accessing to the LCT program using the PC. For the detail procedure, refer to Section IV Appendix LCT Operation Manual.3.1 Equipment SetupThe equipment setup menu decides system fundamental configuration. Note: For the details of setup item of the LAN PORT USAGE, refer to the LAN INTERFACE (10/100BASE T(X)) Application and Setting in Section IV.

SYSTEM SETUP ROI-S057493-2Equipment Setup for SONETUser Interface OC-3 GbE over OC-32Port LAN over OC-3Redundancy Setting 1+0(TERM)1+1(Hot Standby TERM)1+1(Twinpath TERM)INTFC Main (WORK) OC-3(Optical)OC-3(Electrical) GbE over OC-3 When the “SONET GbE over OC-3” is selected for User Interface.2Port LAN over OC-3INTFC SUB (PROT) Not UsedOC-3 (Optical)WSWS/LANXPIC Usage Not UsedUsed (Main Master)Used (SUB Master)APS Function UnavailableAvailableModulation Scheme 128QAM (fixed)Transmission Capacity 156MB (fixed)TX RF Frequency(No.1) [MHz] TX RF Frequency(No.2) [MHz] RX RF Frequency(No.1) [MHz] RX RF Frequency(No.2) [MHz] Frame ID(No.1) (Up to #32)Frame ID(No.2) (Up to #32)TX Power Control MTPCATPCLAN Port Usage (Main) USED (fixed when GbE INTFC is applied.)LAN Capacity(Main) 150Mbps (fixed when GbE INTFC is applied.)LAN Port Usage (Main) P1=75MB/P2=75MB (selectable when LAN INTFC is applied.)P1=100MB/P2=50MBBest EffortP1=100MB/P2=Not UsedLAN Capacity(Main) 150Mbps (fixed when LAN INTFC is applied.)LAN Port Usage (SUB) P1-2 Shared/1Port Only(WS)P1-2 Shared/1Port Only(SC)LAN Capacity(SUB) 64kbps128kbps192kbps256kbps2Mbps

ROI-S05749 SYSTEM SETUP3-3---ODU FREQ INF---TX Start Frequency(No.1) [MHz]TX Stop Frequency(No.1) [MHz]Frequency Step(No.1) [MHz]Shift Frequency(No.1) [MHz]Upper/Lower(No.1)Sub Band(No.1)TX Start Frequency(No.2) [MHz]TX Stop Frequency(No.2) [MHz]Frequency Step(No.2) [MHz]Shift Frequency(No.2) [MHz]Upper/Lower(No.2)Sub Band(No.2)Equipment Setup for SONET

SYSTEM SETUP ROI-S057493-43.2 Provisioning SetupThe provisioning setup menu determines system fundamental functions. SONET Provisioning SetupProvisioning BER Threshold Setting High BER Threshold Low BER/E BER(DMR) SD(DMR) E BER(MUX) SD(MUX)BER Threshold Setting High BER Threshold 1E-3 1E-4 1E-5Low BER Threshold 1E-6 1E-7 1E-8 1E-9E-BER (DMR) 1E-3 1E-4 1E-5SD (DMR) 1E-6 1E-7 1E-8 1E-9E-BER (MUX) 1E-3 1E-4 1E-5SD (MUX) 1E-6 1E-7 1E-8 1E-9SC Assignment RS-232C-1/2 V11-1/2 V-11-1/2 Direction SettingNot Used SC1 SC2 SC3 SC4 E1 (MUX)F1(MUX)E1(DMR)F1(DMR) Not Used SC1 SC2 SC3 SC4 E1 (MUX) F1(MUX) DCCr(MUX) E1 (DMR) F1(DMR) DCCR(DMR) F1(DMR) Co-directional Contra-directionalLAN Port Setting (For GbE INTFC)LAN Port SettingSwitching Function Disable EnablePortMedia Type SFP RJ-45Speed & Duplex AUTONEG (1000MB Full Duplex).)Flow Control Off OnLink Loss Forwarding Disabled Enabled

ROI-S05749 SYSTEM SETUP3-5LAN Port Setting (For LAN INTFC)INTFC (Main) SettingSwitching FunctionClock Souce Setting Internal Clock DMR Internal -> ClockPort1Port Usage Not Used UsedSpeed & Duplex AUTONEG (Auto-MDI/MDX)10M-Half (MDI)10M-Full (MDI)100M-Half (MDI)100M-Full (MDI)10M-Half (MDIX)10M-Full (MDIX)100M-Half (MDIX)100M-Full (MDIX)Flow Control Off OnCollision Report Not Report ReportPort2Port Usage Not Used UsedSpeed & Duplex AUTONEG (Auto-MDI/MDX)10M-Half (MDI)10M-Full (MDI)100M-Half (MDI)100M-Full (MDI)10M-Half (MDIX)10M-Full (MDIX)100M-Half (MDIX)100M-Full (MDIX)Flow Control Off OnCollision Report Not Report ReportLink Loss Forwarding Disabled EnabledLAN Port Setting (For LAN INTFC)INTFC (SUB) SettingSwitching Function Disabled EnabledPort1Port Usage Not Used UsedSpeed & Duplex AUTONEG (Auto-MDI/MDX)10M-Half (MDI)10M-Full (MDI)100M-Half (MDI)100M-Full (MDI)10M-Half (MDIX)10M-Full (MDIX)100M-Half (MDIX)100M-Full (MDIX)Flow Control Off OnCollision Report Not Report ReportLink Loss Forwarding Disabled EnabledPort2(Items for Port 2 are same as the Port1)

SYSTEM SETUP ROI-S057493-6OC-3 Setting MS-AIS Generation Disabled EnabledALS ALS Function Disabled EnabledALS Interval 60sec 180sec 300secTX Power Control ATPC Threshold Level(No.1/2) [dBm] Additional ATT(No.1/2 [dB] ATPC Range(MAX)(No.1/2) [dB] ATPC Range(MIN)(No.1/2) [dB] ATPC Power Mode(No.1/2) HOLD Max MINMTPC TX Power (No.1/2) [dBm] ATPC Threshold Level(No.1/2) [dBm] Additional ATT(No.1/2) [dB]Condition for TX/RX SW TX SW Priority RX SW Priority RX SW Maintenance Mode RX SW Condition-Early WarningNon-Priority Priority No.1 Non-Priority Priority No.1 Manual Forced Included EW Excluded EWCondition for APS APS Maintenance ModeAPS Condition-SF(PROT) APS Condition-Signal Degrade-SD(B1) Lock in UsageLock in Count [times] Lock in Detect Time [min] Lock in Hold Time [hours]Manual Forced Priority High Priority Low Included SD Excluded SD Not Used UsedRelay Setting ALM output for RL1 to RL6 HK output for RL3 to RL6 Cluster1 to Cluster4 inputCluster1 to Cluster4 outputOut HK Disabled Enabled OutTCN Threshold(15min) DMR/ OCR/RCVR MUX OCR/RCVROFS UAS ES SES BBE SEPTCN Threshold(1day) DMR/ OCR/RCVR MUX OCR/RCVROFS UAS ES SES BBE SEPPMON Select RX Level TCN Threshold [dBm] SES Activation Condition 30[%] 15[%]Others EOW2 External SettingAlarm Correlation CapacityNormal Invert Off On

ROI-S05749 SYSTEM SETUP3-73.3 Events and PerformanceThe alarm and status condition are based upon equipment setup and provisioning setup, therefore indication items vary depending on the those setup.The summarized event and performance monitoring that are displayed on the LCT PC are listed in the following table. For the detailed items, refer to Section IV Appendix LCT OPERATION MANUAL.

SYSTEM SETUP ROI-S057493-8Event List SONETAlarm Status ODUODUTX PowerTX InputRX Level APC ODU CPU Mute StatusLO REF : only XPIC configurationTX SW Status : only 1+1 configurationRX SW Status : only 1+1 configurationMODEMMODEM MODEM Unequipped LOF Route ID High BER Low BER Early Warning MOD DEMInput VoltagePower SupplyIF Cable Short Linearizer Status Linearizer Fail Cable EQL XIF XCTRL : only XPIC configurationXPIC Status XREF ATPC Power ModeCTRLCTRL ModuleMMC MountAPS SW Fail : only APS configurationAPS Online Status : only APS configurationAPS Lock in Status : only APS configurationXCTRL : only XPIC configurationXCTRL Mode Mismatch : only XPIC configurationUAEOC-3(1)/UAE(MUX) OC-3(1)/UAE(DMR)

ROI-S05749 SYSTEM SETUP3-9INTFC (Main)UnequippedType MismatchOC-3(1) LOS (MUX) OC-3(1) LOS (DMR) OC-3(1) LOF (MUX) OC-3(1) LOF (DMR) OC-3(1) Output ControlOC-3(1) E-BER (MUX) OC-3(1) E-BER (DMR) OC-3(1) SD (MUX) OC-3(1) SD (DMR) OC-3(1) In-PhaseOC-3(1) TFINTFC (Main)UnequippedType MismatchModule LAN LinkLink Loss ForwardingSpeed & Duplex GbE INTFCLOS (DMR)LOF (DMR)E-BER (DMR)SD DMRInphaseTFEvent List SONET

SYSTEM SETUP ROI-S057493-10INTFC (Sub)INTFC(2) UnequippedOC-3(2) LOS (MUX)OC-3(2) E-BER (MUX)OC-3(2) E-BER (DMR) OPT INTFC applies APSOC-3(2) SD (MUX)OC-3(2) SD (DMR)OC-3(2) Output ControlOC-3(2) In-PhaseOC-3(2) LOS (DMR)OC-3(2) LOF (MUX)OC-3(2) LOF (DMR)OC-3(2) TFUnequippedType MismatchModuleLAN Link *1LAN Collision *1 When LAN PortLink Loss Forwarding *1Speed & Duplex *1TCN-RX LEVTCN-RX LEV-15minTCN-RX LEV-1dayEvent List SONET

ROI-S05749 SYSTEM SETUP3-1115min 1 dayTCN-OFS-15min Total TCN-UAS-15min Total TCN-ES-15min Total TCN-SES-15min Total TCN-BBE-15min Total TCN-SEP-15min Total TCN-OFS-15min(MUX) TCN-UAS-15min(MUX) TCN-ES-15min(MUX) TCN-SES-15min(MUX) TCN-BBE-15min(MUX) TCN-SEP-15min(MUX) TCN-OFS-15min(MUX)(P) TCN-UAS-15min(MUX)(P) TCN-ES-15min(MUX)(P) only APS configurationTCN-SES-15min(MUX)(P) TCN-BBE-15min(MUX)(P) TCN-SEP-15min(MUX)(P) TCN-OFS-1day Total TCN-UAS-1day Total TCN-ES-1day Total TCN-SES-1day Total TCN-BBE-1day Total TCN-SEP-1day Total TCN-OFS-1day(MUX) TCN-UAS-1day(MUX) TCN-ES-1day(MUX) TCN-SES-1day(MUX) TCN-BBE-1day(MUX) TCN-SEP-1day(MUX) TCN-OFS-1day(MUX)(P) TCN-UAS-1day(MUX)(P) TCN-ES-1day(MUX)(P) TCN-SES-1day(MUX)(P) only APS configurationTCN-BBE-1day(MUX)(P) TCN-SEP-1day(MUX)(P)Event List SONET

SYSTEM SETUP ROI-S057493-12PMON(History)RX LevelRX Level(15min)RX Level(1day)DMR (W) (1day)StatusOFSSEPBBEESSESUASDMR (W) (15min)StatusOFSSEPBBEESSESUASMUX (W) (day)StatusOFSSEPBBEESSESUASMUX (W) (15min)StatusOFSSEPBBEESSESRMON(Line)(15min) only for LANStatusRX UNICASTRX BROADCASTRX MULTICASTRX PAUSERX CEC ERRRX ALIGNMENT ERRRX SYMBOL ERRRX UNDERSIZERX FRAGMENTSRX Pkts 64RX Pkts 65 to 127RX Pkts 128 to 255RX Pkts 256 to 511Event List SONET

ROI-S05749 SYSTEM SETUP3-13Notes : *1 When the LAN/WS INTFC is provided, status of each LAN PORT is displayed as follows.Notes:For the GbE INTFC, there are distinctions for the following functions from the 10BASE-T/100BASE-Tx 1. RX Undersize: Unavailable.2. RX Fragments: Unavailable.3. RX Symbol Errors: For SFP: Available For RJ-45: Unavailable (un-counting, only "0" is indicated.)4. TX Multicast PKts (Including number of the TX pause packets.)5. RX Multicast PKts (Including number of the RX pause packets.)6. Countable packet size for the following items shown in right side of the table and reading must be taken place as follows. (The indication will not be taken placed.)7. The RX Alignments Error is counted as an RX CRC ERR.RX Pkts 512 to 1023RX Pkts 1024 to 1536TX JABBERSTX UNICASTTX BROADCASTTX MULTICASTTX PAUSETX COLLISIONEvent List SONETStatus of LAN PORTLink Collision LLF Speed & DuplexSub PORT1 Link Normal Normal 100M-Full (MDIX)Sub PORT1 Link Normal Normal 100M-Full (MDIX)Indication Reading15 RX Pkts 1024-1536 RX Pkts 1024-151816 RX Pkts 1537-MAX RX Pkts 1519-MAX

SYSTEM SETUP ROI-S057493-143.4 ControlThe control condition is based upon equipment setup and provisioning setup, therefore control items vary depending on the those setup.The control items that are displayed on the LCT PC are listed in the following table. the control operation can be performed in Maintenance “ON”.

ROI-S05749 SYSTEM SETUP3-15Note *1: only for 1+1 Configuration.Control List (SONET)Control MaintenanceTX SW Manual Control *1RX SW Manual Control *1RX SWMaintenance ModeATPC Manual Control(No.1) ATPC Manual Control(No.2) *1TX Mute Control(No.1) TX Mute Control(No.2) *1CW Control(No.1) CW Control(No.2) *1APS Manual Control (Auto/Working/Protection) : Only APS configurationAPS Maintenance Mode : Only APS configurationIF Loopback(No.1)IF Loopback(No.2) *1Main Loopback (Near End) Main Loopback (Near End) INTFC (1) : Only APS configurationMain Loopback (Near End) INTFC (2) : Only APS configurationMain Loopback (Far End)Linearizer Control(No.1) Linearizer Control(No.2) *1ALS Restart : Only Optical INTFCXPIC Control Local(No.1) : Only XPIC configurationXPIC Control Local(No.2) : Only XPIC configurationXPIC Control Remote(No.1) : Only XPIC configurationXPIC Control Remote(No.2) : Only XPIC configurationOffline MaintenanceDADE Adjust RF SUB Band Select(No.1) RF SUB Band Select(No.2) *1RF Shift Frequency Setting(No.1) RF Shift Frequency Setting(No.2) *1Antenna Alignment Mode(No.1) Antenna Alignment Mode(No.2) *1

SYSTEM SETUP ROI-S057493-163.5 Setup DescriptionThe following describes to select suitable functions for the system operation by the provisioning setup.3.5.1 Automatic Laser Shutdown Control (OPT INTFC) (SONET)The OC-3 INTFC (only for OPT) is provided with the Automatic Laser Shutdown (ALS) function that can be enabled or disabled. If the ALS function is enabled, the laser output is periodically turned ON and OFF when the optical cable carrying the OC-3 signal is disconnected inadvertently, or intentionally during maintenance. When the ALS function is disabled, the laser output is always ON even if the optical cable is disconnected. Fig. 3-1 shows a block diagram of the ALS function.If a fault occurs at point A and the absence of the optical input signal in the RX 2 lasts for 550 ±50 msec (OC-3 LOS alarm condition), the optical signal bound for the RX 1 (MUX equipment) from the TX 2 (OPT INTFC module) is interrupted by a control signal generated inside the OPT INTFC module. The MUX equipment detects the loss of signal at RX1 and the ALS function in the MUX will, subsequently, turn off the laser output of TX1. When the fault at point A is cleared the system can be restored by controlling the laser output of TX2 through one of the following modes:• Automatic control• Manual restart (2 sec.) control• Manual restart (90 sec.) control(a) Automatic ControlWhen 60, 180 or 300 sec.(selectable) have elapsed after the optical signal entering RX 2 is cut off, the IDU emits laser signal from TX 2 to RX 1 for 2 sec. This would then cause the laser output of TX1 to turn on. If, at this time, the fault at point A has been cleared, the ALS function will be released and the operation will return to normal.(b) Manual Restart (2 sec.) ControlUpon receiving a command signal for manual restart from the LCT or the PASOLINK network management terminal (PNMT) while the optical input signal to the RX 2 is off, the IDU emits the laser signal from the TX 2 to the RX 1 for 2 ±0.25 sec. This would then cause the laser output of TX1 to turn on. If, at this time, the fault at point A has been cleared, the ALS function will be released and the operation will return to normal (if not it returns to automatic condition).

ROI-S05749 SYSTEM SETUP3-17(c) Manual Restart (90 sec.) ControlUpon receiving a command signal for manual restart for test from the LCT or the PNMT while the optical input signal to the RX 2 is off, the IDU emits the laser signal from the TX 2 to the RX 1 for 90 ±10 sec. This would then cause the laser output of TX1 to turn on. If, at this time, the fault at point A has been recovered, the ALS function will be released and the operation will return to normal (if not it returns to automatic condition).Fig. 3-1 ALS System Functional Block DiagramMUXEQUIPMENT OPT INTFCTX1RX1AO/ERLOS 550 ± 50 ms TIMERO/ERX2TX2CONTLCT or PNMTDATA BUS60/180/300 sec.DELAY2±0.25STX ON TIMERCTRLALS CONTENABLE/DISABLE2STX ON TIMER90±10STX ON TIMERSB/DATA BUSCLEAR

SYSTEM SETUP ROI-S057493-183.5.2 Automatic Protection Switching (APS) (OPT INTFC Optional APS Configuration) (SONET)(a) Line ProtectionThe Automatic Protection Switching (APS) provides for uni-directional line protection against optical cable interface failures. It is performed by detected alarm condition or remote control signal.Fig. 3-2 OPT APS SystemThe OC-3 (OPT) INTFC monitors the OPT line input signal interface condition and when an alarm condition occurs in the optical cable or optical interface module, APS is activated. Also the APS is activated when remote control signal is received.Uni-directional APS is performed only in the receiving section of the local side when a failure or signal degradation of the received signal is detected in one direction. Fig. 3-3 shows APS switching mode.OC-3 (OPT) INTFCMODEMWorkingOPT INOPT OUTProtectionMODEMonly 1+1OC-3 (OPT) INTFCSWSWLOS/LOF/BERDETLOS/LOF/BERDETOPT INOPT OUTCTRLRemoteModule FailureModule Failure SW CTRLSW CTRL

ROI-S05749 SYSTEM SETUP3-19Fig. 3-3 Line Protection(1)(2)Uni-directional Mode Line Protection (Work) (Prot) (Work) (Prot) OC-3 (OPT) INTFC(No.1) OC-3 (OPT) INTFC(No.2) OC-3 (OPT) INTFC(No.1) OC-3 (OPT) INTFC(No.2) Received OPT failure(1)(2)(Work) (Prot) (Work) (Prot) OC-3 (OPT) INTFC(No.1) OC-3 (OPT) INTFC(No.2) OC-3 (OPT) INTFC(No.1) OC-3 (OPT) INTFC(No.2) Received OPT failureNLite EASSOCIATED EQUIPMENTNLite EASSOCIATED EQUIPMENTSW CTRLSW CTRLWORKINGPROTECTIONWORKINGWORKINGPROTECTIONPROTECTIONWORKINGWORKINGPROTECTIONPROTECTIONWORKINGPROTECTIONWORKINGWORKINGPROTECTIONPROTECTIONNote:ON LINEOFF LINE

SYSTEM SETUP ROI-S057493-20(b) APS Function SetupThe APS switchover is performed with the following order of priority of two (2) modes.(1) When “APS Condition-SF” is lower priority (default).• UNEQUIP > LKI*1 > FSW > SF > SD*2 > MSW(2) When “APS Condition-SF” is higher priority.• UNEQUIP > LKI*1 > SF(P) > FSW > SF(W) > SD*2 > MSWNotes: *1 Excluding when the Lock in Usage is set Not Used.*2: Excluding when the APS Condition-SD(B1) is set to Excluded SD.UNEQUIP:Unequipped redundant OC-3 INTFC (OPT).LKI:Lock in (see following descriptions Lock in for detail)FSW:Forced Control (see following descriptions when APS Maintenance Mode is set to Forced)SF: Signal Fail (see following descriptions of APS Condition-SF(PROT) SF(P); Signal Fail of Protection side SF(W); Signal Fail of Working sideSD; Signal Degrade (see following descriptions APS Condition-SD(B1) for detail)MSW;Manual control (see following descriptions when APS Maintenance Mode is set to Manual)

ROI-S05749 SYSTEM SETUP3-21 • APS Maintenance ModeThis is a setup to give priority to manual control operation in maintenance.Manual: Give priority to alarm events in maintenance operation. In this mode, manual control disables the operation under alarm condition.Forced: Give priority to forced control in maintenance operation. In this mode, manual control enables the operation under alarm condition and the alarmed side can be selected.Caution: When the APS Maintenance Mode is set to “Forced” in provisioning, APS manual control can select either Working or Protection line though one is alarmed. Then, take care switching to avoid traffic interruption.• APS Condition-SF(PROT):This is a setup to give higher priority to switchover by SF in Protection side.Priority High: This setup gives highly priority to SF of Protection side (installed in INTFC Slot2) for switchover control condition. Since the setup gives priority higher than the Forced Control, the ONLINE is maintained in Main side (installed in INTFC Slot1) under occurrence of SF condition of Protection side. LCT MENUAlarm/StatusEquipment SetupInventoryAUX I/OMaintenanceProvisioningBER Threshold SettingSC AssignmentOC-3 SettingTX Power ControlCondition for TX/RX SWCondition for APSRelay SettingTCN Threshold (15min)TCN Threshold (1day)PMON SelectOthersMeteringPMON(Current)PMON(History) ---Condition for APS--- RangeAPS Maintenance Mode Manual ForcedAPS Condition-SF(PROT) Priority High Priority LowAPS Condition-SD(B1) Included SD Excluded SDLock in Usage Not Used UsedLock in Detect Count [times] 4 1 to 255Lock in Detect Time [min] 10 1 to 60Lock in Hold Time [hours]) 24 1 to 48

SYSTEM SETUP ROI-S057493-22• APS Condition-SD(B1)This is a setup that it includes the SD or excludes SD for the switchover control condition. When including it, the switchover is performed when SD reaches the threshold value which is set in BER Threshold/SD (MUX) in provisioning.Include SD: Including SD for switchover conditionExclude SD: Excluding SD for switchover condition• Lock inThe function is used to pause the switchover activation for a period of time when in the switchover of frequent occurrence.The following setting is needed to be used for it.Lock in Count: Setup for the Lock in threshold value of the switchover number of times. (setting range: 1 to 255 times)Lock in Detect time: Setup for the watching interval of counting number of times for Lock in. (setting range: 1 to 60 minutes)Lock in Hold time: Setup for the duration of pause of switchover in the Lock in condition. (setting range: 1 to 48 hours)The Lock in status can be observed on the Alarm/Status of LCT display. The Lock in condition may be released after passing the Lock in Hold time or the change of setting. The following is an example in default value.• Lock in Count: 4• Lock in Detect time: 10• Lock in Hold time: 24This sets into the Lock in condition when the switchover is activated more than 4 times within 10 minutes interval of watching number of times. The switchover activation pauses during 24 hours after set in the Lock in condition. The Lock in condition will be released after passing of 48 hours and it sets into normal mode.When it will be manually released that under the Lock in condition, perform resetting by changing parameter value or changing the setting condition to “Lock in Usage Not Used”.

ROI-S05749 SYSTEM SETUP3-233.5.3 Automatic Transmitter Power ControlThe automatic transmit power control (ATPC) function automatically varies the TX output power according to path conditions. In the SHF and EHF band, fading exerts heavy influences on propagation, causing the receive signal level at the opposite station to vary. The ATPC function operates by controlling the transmit output power of the opposite station according to the variation of the received signal level at the local station. ATPC provides the following advantages:• Improvement in up fading characteristics• Improvement in residual BER characteristics• Reduction of interference to intra system• Reduction of interference to inter systemNote: In the XPIC configuration, ATMC/MTPC setup and action control in the Sub Master station are applied from the Main Master station.A functional block diagram of the ATPC operation is shown in Fig. 3-4. ATPC improves the BER characteristics under adverse changes in climatic conditions and reduces the possibility of interference. To implement ATPC, the received level (RX LEV) is detected by the Receiver (RX) in the ODU and passed to the CPU in the CTRL module. The CPU then determines whether the transmit output power needs to be controlled. This is based on the transmit output power and the minimum and maximum values of the output control range (ATPC range). ATPC is relevant for the receiving threshold level that were previously specified using the LCT or PNMT (as ATPC Threshold Level).A control signal (POWER CTRL), whose function is to maintain the received RX signal level (RSL) by decreasing or increasing the TX output power of the opposite station, is generated by the CTRL module through the MD Unit. This control signal is based on the result of comparison between the current receiver input level and the preset receiving threshold level. This control signal is sent to the opposite station to control its transmit output power.At the opposite station, this control signal is detected by the CTRL module. The TR Unit, in accordance with this control signal, produces a control that will either raise, lower or maintain the current TX output power.

SYSTEM SETUP ROI-S057493-24Fig. 3-4 ATPC, Functional BLock DiagramExample of ATPC setting.Where ATPC MAXIMUM PWR of ATPC Range is set to 0 dB, ATPC MINIMUM PWR is set to -10 dB and RX Threshold to -55 dBm. In this case, if RX level is lower than -55 dBm, monitor/control is performed with the interval of 8 msec. RX level is monitored in 1 dB step, and TX output is controlled in 1 dB step. However, a fixed hysteresis of 5 dB referred to the RX Threshold is implemented for ATPC operation. Example: If RX Threshold is set to -55 dBm, no output control is made unless the RX level goes below -55 dBm or goes above -50 dBm, so that the receive level is maintained within -55 to -50 dBm by ATPC.TXTXRXRXPOWER CONTREMOTERX IN LEVREMOTECTRL CTRLATPC CTRL ATPC CTRLTRANSMITTING STATION RECEIVING STATIONMODEMMODEMMODEMMODEM-50 dBm RX LEVEL-55 dBm(RX THRESHOLD LEVEL) 5 dB(ATPCHYSTERESIS)

$ROI-S05749 SYSTEM SETUP3-25Using MTPC-ATPCThe ATPC Control System of the PASOLINK transmits the information on the receiving level to the opposite station and controls the transmission level of its local station in accordance with the receiving level of the opposite station. Transmission level control can be used not only for setting the same operation (ATPC-ATPC) between local station and opposite station but also for operation in combination of stations with different operations (MTPC-ATPC, ATPC-MTPC). The station set in MTPC mode is not controlled by the information from opposite station but is fixed in its transmitting output level.Even if the station is set in the MTPC mode, the opposite station is likely to be set in the ATPC mode. Therefore, setting the RX Threshold (ATPC Threshold level) is required for controlling the transmission level of the opposite station. Between the stations that are respectively set in the MTPC mode, however, the setting is disabled.The following is an example of operation between stations set in MTPC-ATPC mode.The transmitting level of station B is controlled so that the receiving level of station A in the above figure reaches the RX Threshold set level (−50 dBm) set in station A. This method is used in station A for reducing the level of interference to other route. As station A is set in the MTPC mode, the transmitting level is kept unchanged.An example of using MTPC-ATPC is shown below. As shown in the figure, in the master station communicating with many substations, waves gather from substations possibly causing interferences. Therefore, substations must be set in the ATPC mode to minimize the diffraction (interference) to other routes while reducing the receiving levels from individual substations to the minimum. In substations, there is little possibility of occurring interferences; therefore, the master station is set in the MTPC mode to permit transmission at a constant level.MTPC(RX Threshold: −50 dBm) ATPCPASOLINKODUPASOLINKODUSTATION A STATION B$

$SYSTEM SETUP ROI-S057493-26A constant transmit output power in both MTPC and ATPC is maintained using the ALC function which is provided in the RF CKT module. The ALC circuit detect the transmit output power using a diode to obtain a DC voltage proportional to the transmit power. The gain of the RF amplifier is controlled inversely with this detected DC voltage to maintain the transmit output power within the specified limits.When the ATPC malfunction occurs, transmitter output power is maintained at the following level according to the ATPC mode. The ATPC mode is set in provisioning using LCT.Hold:Maintain the TX output level at the current level, when the ATPC malfunction occurs. MAX:Maintain the TX output level at ATPC maximum level, when the ATPC malfunction occurs.MIN:Maintain the TX output level at ATPC minimum level, when the ATPC malfunction occurs.(ATPC)SUBSTATION 2(ATPC)SUBSTATION 3(ATPC)SUBSTATION 4MASTERSTATION(ATPC)SUBSTATION 1(ATPC)SUBSTATION 5(A)(B)(A),(B)(C): Diffraction to other route.: RX received level down.(C)(MTPC)$