ADC Telecommunications DLC1902B Digivance® LRCS 1900 MHz, 20-Watt LPA User Manual 75158

ADC Telecommunications Inc Digivance® LRCS 1900 MHz, 20-Watt LPA 75158

User manual 6

ADCP-75-158 • Issue 1 • July 2003 • Section 4: OperationPage 4-18© 2003, ADC Telecommunications, Inc.2. Right-click on the Host Fwd Delay section of the display (see Figure 4-14). The HostFwd Delay pop-up screen will open as shown in Figure 4-15. 3. Obtain the value of the forward delay as specified in the system design plan. The delay isadjustable in 0.1 µsec steps. 4. Enter the forward path delay value and click OK to close the pop-up screen and to makethe changes take effect. 5. Repeat the process for reverse delay and diversity reverse delay by right-clicking on theappropriate delay section (see Figure 4-14) and then entering the required delay value inthe pop-up screen. 6. Click OK to close each pop-up screen and to make the changes take effect. Figure 4-15. Host Fwd Delay Pop-Up Screen
ADCP-75-158 • Issue 1 • July 2003 • Section 5: MaintenancePage 5-1© 2003, ADC Telecommunications, Inc.SECTION 5: MAINTENANCE1 SYSTEM MAINTENANCE OVERVIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-11.1 Tools and Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-12 FAULT DETECTION AND ALARM REPORTING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-23 FAULT ISOLATION AND TROUBLESHOOTING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-53.1 Host Unit Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-63.2 STM Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-83.3 LPA Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-104 TEST PROCEDURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-114.1 Optical Power Test. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-114.2 Optical Loopback Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-125 MAINTENANCE PROCEDURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-145.1 Scheduled Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-145.2 Remote Unit Outdoor Cabinet Filter Cleaning Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-145.3 Host Unit Fan Replacement Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-155.4 Spectrum Transport Module Fan Replacement Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-175.5 Linear Power Amplifier Fan Replacement Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-19_________________________________________________________________________________________________________1 SYSTEM MAINTENANCE OVERVIEWThis section explains the Digivance system fault detection and alarm reporting system, providesa method for isolating and troubleshooting faults, and provides test and maintenanceprocedures. The Digivance system requires minimal regular maintenance to insure continuousand satisfactory operation. Components that require regular replacement, cleaning, or testinginclude the HU and RU fans and the RU outdoor cabinet air-filter.Maintenance also includes diagnosing and correcting service problems as they occur. When analarm is reported, it will be necessary to follow a systematic troubleshooting procedure to locatethe problem. Once the source of the problem is isolated, the appropriate corrective action can betaken to restore service. The only internal components that can be replaced are the cooling fanswhich mount in the HU, RU, and LPA. The failure of any other component within a unit willrequire replacement of that unit. 1.1 Tools and MaterialsThe following tools and materials are required in order to complete the procedures in thissection: •ESD wrist strap• IR filtering safety glasses• Patch cords with SC connectors• 15 dB in-line SC optical attenuators
ADCP-75-158 • Issue 1 • July 2003 • Section 5: MaintenancePage 5-2© 2003, ADC Telecommunications, Inc.• Optical power meter (1550 and 1310 nm)• TORX screwdriver (with T10 bit)2 FAULT DETECTION AND ALARM REPORTINGThe Digivance system on-board embedded software detects various unit and system faults andreports them as either Major or Minor alarms. A Major alarm indicates that the system hasfailed in a way that directly affects RF transport performance. This usually means that somecalls or perhaps all calls cannot be made over the system. A Minor alarm means that systemperformance is not affected or in some cases, that the performance may no longer be optimal.Four types of faults cause a minor alarm to be reported: overtemperature, fan failure, diversitypath failure, and an external minor fault (user defined fault). All other faults are reported as aMajor alarm. Reporting of Major and Minor alarms is accomplished through the HU alarm contacts, the unitfront panel LED’s, the EMS software Graphical User Interface (GUI), and the NetworkOperations Center - Network Element Manager (NOC/NEM) interface.The HU is equipped with a set of both normally open (NO) and normally closed (NC) alarmcontacts which are used to report both Major and Minor alarms to an external alarm system. Thealarm contacts summarize the inputs so that any Major or Minor alarm will trigger an alarmreport to the external alarm system. The HU, STM, and LPA front panel LED indicators are used to report specific alarms which arereflected in the LED colors: Green, Red, Yellow, and Off. A description of the Host Unit, LinearPower Amplifier, and Spectrum Transport Module LED indicators is provided respectively inTable 5-1, Table 5-2, and Table 5-3. The EMS software GUI provides both a summary and a more detailed list of alarm informationthat includes unit and module level faults, circuit faults, and measured value faults such asvoltages, RF power, and temperature. A summary showing a list of all systems and their currentalarm status is presented through the Alarm OverView display. A detailed list of alarminformation is presented through the HOST alarm display and the REMOTE alarm display. Allthe inputs that the system reports as alarms are shown in the HOST and REMOTE alarmdisplays. The NOC/NEM interface provides the same summary and detailed list of alarm information asthe EMS software GUI but in an ASCII text string format. Sending the command GET ALARMSUMMARY produces a list of all systems and their current alarm status. Sending the commandGET ALARM ALL for a specific system will produce a detailed list of alarm information forthe specified system.
ADCP-75-158 • Issue 1 • July 2003 • Section 5: MaintenancePage 5-3© 2003, ADC Telecommunications, Inc.Table 5-1. Host Unit LED IndicatorsINDICATOR COLOR DESCRIPTIONPOWERGreenOffIndicates if the HU is powered or un-powered.The DC power source is on.The DC power source is off.STANDBYGreen (blinking)Yellow (blinking)Red (blinking)OffIndicates if the system is in the standby, normal, test, or program load mode.The HU is in the standby mode.The HU is in the program load mode. The HU is in the test mode.The HU is in the normal mode. HOST UNITGreenYellowRedIndicates if the HU is normal, over temperature, or if a fault is detected. The HU is normal. High temperature detected in HU. Fault detected by the HU or HU/RU band mismatch.REMOTE UNITGreenYellowRedIndicates if an alarm is detected at the RU. No alarms detected at the RU.A minor alarm is detected at the RU.A major alarm is detected at the RU. DRIVEGreenYellowRedIndicates if the forward path RF signal level is normal, above overdrive threshold, or below underdrive threshold. The RF signal level is normalThe RF signal level is below the underdrive threshold.The RF signal level is above the overdrive threshold. PORT 1/PORT 2GreenRedIndicates if the reverse/forward path optical signals from the STM/HU are normal, if errors are detected, or if the optical signal is not detected. The reverse/forward path optical signal is normal. Excessive errors (see Note) are detected in the reverse or for-ward path optical signals or the HU or STM is not receiving a forward or reverse path optical signal. Note: Excessive errors mean the Bit Error Rate (BER) has exceeded 10–6 (1 bit error per million bits)Table 5-2. Linear Power Amplifier LED IndicatorINDICATOR COLOR DESCRIPTIONSTATUSGreen (blinking)GreenYellow (blinking)YellowRedIndicates the operational state of the LPA and whether or not any faults are detected.The LPA is in the normal state.The LPA is in a forced shutdown state, no faults detected.The LPA is in the normal state, minor fault detected.The LPA is initializing.The LPA is in an internal shutdown state, major fault detected.
ADCP-75-158 • Issue 1 • July 2003 • Section 5: MaintenancePage 5-4© 2003, ADC Telecommunications, Inc.Table 5-3. Spectrum Transport Module LED IndicatorsINDICATOR COLOR DESCRIPTIONAC POWERGreenRedIndicates if the STM is powered by the AC power source or the back-up battery system. The STM is powered by the AC power source. The STM is powered by the back-up battery system.STANDBYGreen (blinking)Yellow (blinking)Red (blinking)OffIndicates if the system is in the standby, normal, test, or program load mode.The STM is in the standby mode.The STM is in the program load mode. The STM is in the test mode.The STM is in the normal mode. HOST UNITGreenYellowRedIndicates if an alarm is detected at the HU. No alarms detected at the HU.A minor alarm is detected at the HU.A major alarm is detected at the HU. STMGreenYellowRedIndicates if the STM is normal, over temperature, or if a fault is detected. The STM is normal. The STM is over temperature due to high ambient temperature or the fan has failed. Fault detected by the STM or HU/RU band mismatch. PAGreenYellowRedIndicates if the LPA is normal, over temperature, has a fan failure, or is faulty. The LPA is normal. The LPA is over temperature or the fan has failed. Internal fault detected in the LPA. VSWRGreenRedIndicates if the forward path VSWR is above or below the threshold. The VSWR is below the threshold. The VSWR is above the threshold. PORT 1/PORT 2GreenRedIndicates if the forward/reverse path optical signals from the HU/STM are normal, if errors are detected, or if the optical signal is not detected. The forward/reverse path optical signal is normal. Excessive errors (see Note) are detected in the forward or reverse path optical signals or the STM or HU is not receiving a forward or reverse path optical signal. Note: Excessive errors mean the Bit Error Rate (BER) has exceeded 10–6 (1 bit error per million bits)
ADCP-75-158 • Issue 1 • July 2003 • Section 5: MaintenancePage 5-5© 2003, ADC Telecommunications, Inc.3 FAULT ISOLATION AND TROUBLESHOOTINGAlarm information may be accessed and faults isolated using the information provided by theunit front panel LED indicators, the EMS software GUI alarm displays, or the NOC-EMSinterface. Because the alarm information provided by the EMS GUI and the NOC-EMSinterface is very detailed, refer to Table 5-4, Table 5-5, or Table 5-6 to determine the unit LEDindicator (Host Unit, Remote Unit, or LPA) that corresponds to the indicated alarm. Then referto Table 5-7, Table 5-8, or Table 5-9 to identify the problem, check out the possible causes, andtake corrective action. Table 5-4. Host Unit Major and Minor AlarmsMAJOR ALARM LED INDICATOR MAJOR ALARM LED INDICATOROperating Mode STANDBY Fwd Synth Lock HOST UNIT8 Volt HOST UNIT RF Mute (Does not apply)Pri No Light PORT 1/PORT 2 Major Extern Output (Does not apply)Pri Fwd Mux Lock HOST UNIT Companion Lost (Does not apply)Pri Rev Synth Lock HOST UNIT MINOR ALARMS LED INDICATOROverdrive DRIVE Temperature HOST UNITUnit Mismatch HOST UNIT Sec No Light (Does not apply)Link Alarm (Does not apply) Sec Errors (Does not apply)3.8 Volt HOST UNIT Sec Rev Synth Lock (Does not apply)Pri Laser Fail HOST UNIT Underdrive DRIVEPri Errors PORT 1/PORT 2 Minor Extern Output (Does not apply)Table 5-5. Remote Unit Major AlarmsMAJOR ALARM LED INDICATOR MAJOR ALARM LED INDICATOROperating Mode STANDBY Battery Voltage (Does not apply)3.8 Volt STM Pri Laser Fail STMPri Errors PORT 1/PORT 2 Fwd Synth Lock STMReference Synth Lock STM System VSWR VSWRLPA DC Fail PA LPA Low Power PALPA VSWR PA Unit Mismatch STMLink Alarm (Does not apply) Converter STMAC Fail AC POWER Pri No Light PORT 1/PORT 28 Volt STM Pri Rev Synth Lock STMPri Rev Mux Lock STM LPA Detect PARF Mute (Does not apply) LPA Over Power PALPA Loop Failed PA Companion Lost (Does not apply)Major Extern Alarm Inp (Does not apply) – –
ADCP-75-158 • Issue 1 • July 2003 • Section 5: MaintenancePage 5-6© 2003, ADC Telecommunications, Inc.3.1 Host Unit TroubleshootingDuring normal HU operation, all LED’s should be green except the STANDBY LED whichshould be Off. When a Minor alarm occurs, one or more of the LED’s will turn yellow. When aMajor alarm occurs, one or more of the LED’s will turn red. It is recommended that whenever there are multiple alarms, the optical alarms should bechecked and cleared first. Because the host and remote units function as a system, a fault in thefiber optic link will cause various unit alarms to be reported. Table 5-6. Remote Unit Minor AlarmsMINOR ALARM LED INDICATOR MINOR ALARM LED INDICATORTemperature STM Sec Laser Fail (Does not apply)Sec Rev Mux Lock (Does not apply) Sec Rev Synth Lock (Does not apply)Rev Path Level (Does not apply) LPA Disable STATUS (LPA)LPA Fan PA LPA High Temp PAMinor Extern Alarm Inp (Does not apply) RF Out Very Low (Does not apply)Table 5-7. Host Unit Fault Isolation and TroubleshootingLED: POWER Color: Off Alarm Type: MajorPROBLEM: The HU is not powered.POSSIBLE CAUSE CORRECTIVE ACTION/COMMENTS1. The fuse is open or removed from the fuse panel. 1. Replace or reinstall fuse at fuse panel. LED: STANDBY Color: Green (blinking) or Yellow (blinking)Alarm Type: NonePROBLEM: The HU is out of service.POSSIBLE CAUSE CORRECTIVE ACTION/COMMENTS1. The HU is in the standby (green) or program load (yellow) mode. 1. Use EMS to place the HU in the normal (off) mode.LED: HOST UNIT Color: Yellow Alarm Type: MinorPROBLEM: The HU is overheating.POSSIBLE CAUSE CORRECTIVE ACTION/COMMENTS1. Air intake or exhaust opening to HU chassis is blocked2. Ambient temperature > 50º C/122º F. 3. Faulty fan. 1. Remove cause of air-flow blockage. 2. Reduce ambient temperature.3. Replace HU fan (See Section 5.3).
ADCP-75-158 • Issue 1 • July 2003 • Section 5: MaintenancePage 5-7© 2003, ADC Telecommunications, Inc.LED: HOST UNIT Color: Red Alarm Type: MajorPROBLEM: A major alarm fault detected by HU.POSSIBLE CAUSE CORRECTIVE ACTION/COMMENTS1. Fiber optic link fault.2. HU and STM band mismatch. 3. The HU has failed. 1. Follow procedure specified when the PORT 1/ PORT 2 LED is red. 2. Replace HU or STM with correct unit. 3. Replace the HU. LED: REMOTE UNIT Color: Yellow Alarm Type: MinorPROBLEM: A minor alarm fault is detected at the RU. POSSIBLE CAUSE CORRECTIVE ACTION/COMMENTS1. The STM or LPA is overheating. 1. Check RU LED indicators and refer to Table 5-8 LED: REMOTE UNIT Color: Red Alarm Type: MajorPROBLEM: A major alarm fault is detected at the RU. POSSIBLE CAUSE CORRECTIVE ACTION/COMMENTS1. Fiber optic link fault. 2. AC power failure at RU.3. High VSWR.4. The RU cabinet door is open or the STM or LPA has failed.1. Check RU LED indicators and refer to Table 5-8. 2. Check RU LED indicators and refer to Table 5-8. 3. Check RU LED indicators and refer to Table 5-8. 4. Check RU LED indicators and refer to Table 5-8. LED: DRIVE Color: Yellow Alarm Type: MinorPROBLEM: The RF input signal level is below the underdrive threshold. POSSIBLE CAUSE CORRECTIVE ACTION/COMMENTS1. Faulty BTS or faulty coaxial connection between the HU and the BTS.2. Incorrect attenuation in forward path RF coax- ial link. 1. Check forward path signal level at the HU.2. Check Host Forward Attenuator setting and adjust if attenuation is too high.LED: DRIVE Color: Red Alarm Type: NonePROBLEM: The RF signal is above the overdrive threshold.POSSIBLE CAUSE CORRECTIVE ACTION/COMMENTS1. Composite output signal level from BTS is too high. 2. Incorrect attenuation in forward path RF coaxial link. 1. Check BTS composite output signal level and adjust if too high. 2. Check Forward Attenuator setting and adjust if attenuation is too low. LED: PORT 1/PORT 2 Color: Red Alarm Type: MajorPROBLEM: Excessive errors are detected in the reverse or forward path optical signal or no forward or reverse path optical signal is detected.POSSIBLE CAUSE CORRECTIVE ACTION/COMMENTS1. Faulty reverse or forward path optical fiber. 2. Faulty optical transmit port at the STM or HU; or faulty optical receive port at the STM or HU. 1. Test optical fiber. Clean connector if dirty. Repair or replace optical fiber if faulty. (See Section 4.1).2. Test optical ports. Replace HU or STM if port is faulty (See Section 4.2). Table 5-7. Host Unit Fault Isolation and Troubleshooting, continued
ADCP-75-158 • Issue 1 • July 2003 • Section 5: MaintenancePage 5-8© 2003, ADC Telecommunications, Inc.3.2 STM TroubleshootingDuring normal STM operation, all LED’s should be green except the STANDBY LED whichshould be Off. When a Minor alarm occurs, one or more of the LED’s will turn yellow. When aMajor alarm occurs, one or more of the LED’s will turn red. It is recommended that whenever there are multiple alarms, the optical alarms should bechecked and cleared first. Because the host and remote units function as a system, a fault in thefiber optic link will cause various unit alarms to be reported. Table 5-8. STM Fault Isolation and TroubleshootingLED: AC POWER Color: Off Alarm Type: MajorPROBLEM: The RU is powered by the battery back-up system.POSSIBLE CAUSE CORRECTIVE ACTION/COMMENTS1. The AC power system circuit breaker is open or the AC power has failed. 2. The STM has failed. 1. Check the AC power system, repair as needed, and reset circuit breaker. 2. Replace the STM. LED: STANDBY Color: Green (blinking) or Yellow (blinking)Alarm Type: NonePROBLEM: The RU is out of service.POSSIBLE CAUSE CORRECTIVE ACTION/COMMENTS1. The RU is in the standby (green) or program load (yellow) mode. 1. Use EMS to place the RU in the normal (off) mode.LED: HOST UNIT Color: Yellow Alarm Type: MinorProblem: A minor alarm fault is detected at the HU. POSSIBLE CAUSE CORRECTIVE ACTION/COMMENTS1. The HU is overheating. 1. Check HU LED indicators and refer to Table 5-7 LED: HOST UNIT Color: Red Alarm Type: MajorPROBLEM: A major alarm fault is detected at the HU. POSSIBLE CAUSE CORRECTIVE ACTION/COMMENTS1. Fiber optic link fault. 2. The HU is not powered. 3. The HU has failed. 1. Check HU LED indicators and refer to Table 5-7.2. Check HU LED indicators and refer to Table 5-7.3. Check HU LED indicators and refer to Table 5-7.LED: STM Color: Yellow Alarm: MinorPROBLEM: The STM is overheating.POSSIBLE CAUSE CORRECTIVE ACTION/COMMENTS1. Air intake or exhaust opening to the remote unit cabinet is blocked2. Ambient temperature > 50º C/122º F. 3. Faulty fan. 1. Remove cause of air-flow blockage. 2. Reduce ambient temperature.3. Replace STM fan (See Section 5.4).
ADCP-75-158 • Issue 1 • July 2003 • Section 5: MaintenancePage 5-9© 2003, ADC Telecommunications, Inc.LED: STM Color: Red Alarm Type: MajorPROBLEM: A major alarm fault detected by the STM.POSSIBLE CAUSE CORRECTIVE ACTION/COMMENTS1. Fiber optic link fault. 2. The HU is not powered. 3. HU and STM band mismatch. 4. The STM has failed. 1. Follow procedure specified when the PORT 1/ PORT 2 LED is red. 2. Check HU LED indicators and refer to Table 5-73. Replace HU or STM with correct unit. 4. Replace the STM. LED: PA Color: Yellow Alarm Type: MinorPROBLEM: The LPA is overheating. POSSIBLE CAUSE CORRECTIVE ACTION/COMMENTS1. Air intake or exhaust opening to the remote unit cabinet is blocked2. Ambient temperature > 50º C/122º F. 3. Faulty LPA fan. 1. Remove cause of air-flow blockage. 2. Reduce ambient temperature.3. Replace LPA fan (See Section 5.5).LED: PA Color: Red Alarm Type: MajorPROBLEM: The LPA in not detected, the RF power is low or not present, or the LPA detects a major alarm. POSSIBLE CAUSE CORRECTIVE ACTION/COMMENTS1. The LPA is not present. 2. The LPA RF output is turned off. 3. The forward path RF cables or connectors are faulty. 4. The LPA is in the forced shutdown state. 5. The LPA is losing gain due to an internal fault. 6. The STM duplexer has failed. 1. Install LPA.2. Place LPA MUTE/NORM/RESET switch in the NORM position. 3. Inspect cables and connectors and repair or replace if faulty. 4. Check LPA display for messages and then refer to Table 5-9. Replace the LPA if it is faulty. 5. Replace LPA. 6. Replace the STM. LED: VSWR Color: Red Alarm Type: MajorPROBLEM: The forward path VSWR is above the threshold. POSSIBLE CAUSE CORRECTIVE ACTION/COMMENTS1. Faulty antenna or antenna system. 2. Faulty antenna cable. 3. The STM has failed. 1. Check the antenna circuit for shorts or opens (including lightning protector).2. Check the antenna cable for faulty connections.3. Replace the STM. LED: PORT 1/PORT 2 Color: Red Alarm Type: MajorPROBLEM: Excessive errors are detected in the reverse or forward path optical signal or no forward or reverse path optical signal is detected.POSSIBLE CAUSE CORRECTIVE ACTION/COMMENTS1. Faulty forward or reverse path optical fiber. 2. Faulty optical transmit port at the HU or STM; or faulty optical receive port at the HU or STM. 1. Test optical fiber. Clean connector if dirty. Repair or replace optical fiber if faulty. (See Section 4.1).2. Test optical ports. Replace HU or STM if port is faulty (See Section 4.2).Table 5-8. STM Fault Isolation and Troubleshooting, continued
ADCP-75-158 • Issue 1 • July 2003 • Section 5: MaintenancePage 5-10© 2003, ADC Telecommunications, Inc.3.3 LPA TroubleshootingDuring normal LPA operation, the STATUS LED should be blinking green (normal operation)or blinking yellow (minor fault). Table 5-9. LPA Fault Isolation and TroubleshootingLED: STATUS Color: Green Alarm Type: NonePROBLEM: The LPA is in the forced shutdown state.POSSIBLE CAUSES1.The MUTE/NORM/RESET switch is in the MUTE position. 2. The Digivance system is in the STANDBY mode. 1. Place MUTE/NORM/RESET switch in the NORM position. 2. Use EMS to change Digivance system from standby mode to the normal mode. LED: STATUS Color: Yellow (blinking) Alarm Type: MinorPROBLEM: The LPA detects a minor fault. POSSIBLE CAUSE CORRECTIVE ACTION/COMMENTS1. The LPA fan has failed but unit not overheated. 1. Replace LPA fan. (see Section 5.5)LED: STATUS Color: Red Alarm Type: MajorPROBLEM: The LPA is in the internal shutdown state.POSSIBLE CAUSE CORRECTIVE ACTION/COMMENTS1. The interface cable between the LPA and STM is faulty, the antenna cable is faulty, the antenna or antenna system is faulty, or the STM duplexer is faulty (VSWR alarm).2. The power level of the RF forward path composite input signal at the HU is too high. (Over power alarm)3 The LPA fan has failed and unit has overheated. (High temp alarm)4. Air intake or exhaust opening to RU outdoor cabinet is blocked causing unit to overheat. (High temp alarm)5. RU ambient temperature > 50º C/122º F. (High temp alarm)6. The LPA is faulty. (VSWR, DC fail, Loop fail, or low power alarm)1. Inspect cable, antenna, and connectors and repair or replace if faulty. Replace STM if duplexer is faulty. To reset, use EMS to place Digivance system in standby mode and then place system back in normal mode. 2. Check the power level of the RF composite input signal at the HU and adjust to correct level. To reset, use EMS to place Digivance system in standby mode and then place system back in normal mode. 3. Replace LPA fan. (see Section 5.5). To reset, use EMS to place Digivance system in standby mode and then place system back in normal mode. 4. Remove cause of air-flow blockage. To reset, use EMS to place Digivance system in standby mode and then place system back in normal mode. 5. Reduce RU ambient temperature. To reset, use EMS to place Digivance system in standby mode and then place system back in normal mode. 6. Replace LPA.
ADCP-75-158 • Issue 1 • July 2003 • Section 5: MaintenancePage 5-11© 2003, ADC Telecommunications, Inc.4 TEST PROCEDURESThis section provides procedures for common troubleshooting and maintenance tests. Refer tothese procedures as needed when specified in the Fault Isolation and Troubleshooting tables inSection 3. 4.1 Optical Power TestA break in an optical fiber or a fault with the optical connector will interrupt communicationsbetween linked components or generate excessive errors. Use the following procedure to isolatea problem with an optical fiber or connector. 1. Put on the IR filtering safety glasses. 2. Notify the NOC or alarm monitoring system operator that the system is going offline. 3. At the HU and at the STM, place the On/Off switches in the OFF position (press O). 4. Disconnect the optical fiber connectors for the fiber to be tested at the HU and the STM. 5. Inspect the optical connectors. Verify that connectors are clean and that no scratches orimperfections are visible on the fiber end. Clean and polish the optical connectors if necessary. 6. Connect the optical power meter to the output (receiver) end of the optical fiber. If anattenuator was included in the fiber link, make sure the attenuator is installed. 7. Connect the input (transmitter) end of the optical fiber to the far end HU or STM. 8. At the far end HU or STM, place the On/Off switch in the ON position (press I).9. Using the far end HU or STM as an optical light source, measure the optical power at thenear end of the optical fiber. The power level of the optical input signal at the HU or STMmust fall within the following ranges: STM Forward Path Input Signal (Port 1): –15 to –25 dBm (with attenuator installed)HU Reverse Path Input Signal (Port 2): –15 to –23 dBm (with attenuator installed) If the power level of the received optical signal is within the specified range, the opticalfiber and the far end unit are good. If the power level of the received signal is not withthe specified range, either the optical fiber is faulty or the far end unit optical transmitteris faulty. Continue with test procedure to isolate the problem Danger: This equipment uses a Class 1 Laser according to FDA/CDRH rules. Laser radiationcan seriously damage the retina of the eye. Do not look into the ends of any optical fiber. Do notlook directly into the optical transmitter of any unit or exposure to laser radiation may result.An optical power meter should be used to verify active fibers. A protective cap or hood MUSTbe immediately placed over any radiating transmitter or optical fiber connector to avoid thepotential of dangerous amounts of radiation exposure. This practice also prevents dirt particlesfrom entering the connector.Note: Turning off the HU and STM disables the respective lasers which is necessary inorder to safely inspect and clean the optical connectors.
ADCP-75-158 • Issue 1 • July 2003 • Section 5: MaintenancePage 5-12© 2003, ADC Telecommunications, Inc.10. At the far end HU or STM, place the On/Off switch in the OFF position (press O). 11. Disconnect the optical power meter from the near end of the optical fiber.12. Connect the optical power meter to the far end HU (Port 1) or STM (Port 2). 13. At the far end HU or STM, place the On/Off switch in the ON position (press I).14. Measure the optical output power of the far end HU or STM. The power level of theoptical output signal from the HU or STM must meet the following specification: HU Forward Path Output Signal (Port 1): 0 + 1 dBmSTM Reverse Path Output Signal (Port 2): +2 + 1 dBmIf the power level of the optical output signal is within specifications, the optical fiber isfaulty. If the power level of the optical signal is not within specifications, the far endHU or STM optical transmitter is faulty.15. At the far end HU or STM, place the On/Off switch in the OFF position (press O). 16. Disconnect the optical power meter from the far end HU or STM.17. Reconnect the optical fibers at the HU and the STM. 18. Repeat steps 3 through 17 for each optical fiber that requires testing. 19. When ready to put the system back into service, place the On/Off switch in the ONposition (press I) at both the HU and STM. 20. Notify the NOC or alarm monitoring service that the system is going back online. 4.2 Optical Loopback TestThe following procedures provide tests to determine if an optical port fault exists with the HostUnit or with the STM. 4.2.1 Host Loopback Test1. Put on the IR filtering safety glasses. 2. Notify the NOC or alarm monitoring system operator that the system is going offline. 3. At the HU, place the On/Off switch in the OFF position (press O). 4. Disconnect the optical fiber connectors from the PORT 1 and PORT 2 optical ports andplace a dust cap over each connector. Danger: This equipment uses a Class 1 Laser according to FDA/CDRH rules. Laser radiationcan seriously damage the retina of the eye. Do not look into the ends of any optical fiber. Do notlook directly into the optical transmitter of any unit or exposure to laser radiation may result.An optical power meter should be used to verify active fibers. A protective cap or hood MUSTbe immediately placed over any radiating transmitter or optical fiber connector to avoid thepotential of dangerous amounts of radiation exposure. This practice also prevents dirt particlesfrom entering the connector.
ADCP-75-158 • Issue 1 • July 2003 • Section 5: MaintenancePage 5-13© 2003, ADC Telecommunications, Inc.5. Plug a 15 dB in-line optical attenuator into the PORT 1 optical port. 6. Connect a patch cord between the optical attenuator and the PORT 2 optical port. 7. Place the On/Off switch in the ON position (press I) and observe the PORT 1/PORT 2LED indicator. 8. The PORT 1/PORT 2 LED indicator will turn either red or green. If the LED turns red,either the PORT 1 optical transmitter or the PORT 2 receiver is faulty. If the LED turnsgreen, both PORT 1 and PORT 2 optical ports are good. 9. Place the On/Off switch in the OFF position (press O). 10. Remove the dust caps from the optical fiber connectors. 11. Clean each connector (follow connector supplier’s recommendations) and then insert eachconnector into the appropriate optical port. 12. When ready to put the unit back into service, place the On/Off switch in the ON position(press I).13. Notify the NOC or alarm monitoring service that the system is going back online.4.2.2 STM Loopback Test1. Put on the IR filtering safety glasses. 2. Notify the NOC or alarm monitoring system operator that the system is going offline. 3. At the STM, place the On/Off switch in the OFF position (press O). 4. Disconnect the optical fiber connectors from the PORT 1 and PORT 2 optical ports andplace a dust cap over each connector. 5. Plug a 15 dB in-line optical attenuator into the PORT 1 optical port. 6. Connect a patch cord between the optical attenuator and the PORT 2 optical port. 7. Place the On/Off switch in the ON position (press I) and observe the PORT 1/PORT2 LEDindicator. 8. The PORT 1/PORT 2 LED indicator will turn either red or green. If the LED turns red,either the PORT 1 receiver is faulty or the PORT 2 transmitter is faulty. If the LED turnsgreen, both PORT 1 and PORT 2 optical ports are good. 9. Place the On/Off switch in the OFF position (press O). 10. Remove the dust caps from the optical fiber connectors. 11. Clean each connector (follow connector supplier’s recommendations) and then insert eachconnector into the appropriate optical port. 12. When ready to put the unit back into service, place the On/Off switch in the ON position(press I). 13. Notify the NOC or alarm monitoring service that the system is going back online.
ADCP-75-158 • Issue 1 • July 2003 • Section 5: MaintenancePage 5-14© 2003, ADC Telecommunications, Inc.5 MAINTENANCE PROCEDURESThis section specifies the system maintenance requirements and provides the procedures for therequired maintenance tasks. Refer to these procedures as needed when specified in theScheduled Maintenance table. 5.1 Scheduled MaintenanceTable 5-10 lists the items that require regular maintenance and the recommended maintenanceinterval. Refer to the section specified in the table for the required maintenance or testprocedure. 5.2 Remote Unit Outdoor Cabinet Filter Cleaning ProcedureThe RU outdoor cabinet filter cleans the RU intake air before it enters the cabinet. The filtershould be cleaned approximately once per year and more often in extremely dirty environments.If the cabinet temperature gradually rises over a long period of time and there are no fanfailures, it is possible that the filter is dirty and requires cleaning. Use the following procedureto clean the outdoor cabinet filter: 1. Open the RU outdoor cabinet door. 2. Loosen the two set screws that secure the filter to the bottom of the outdoor cabinet asshown in Figure 5-1. 3. Pull the filter out and away from the bottom of the cabinet. Be careful not to damage thefoam strip that provides the air seal. 4. Gently tap the filter against your hand to dislodge any dirt or dust. If necessary, usecompressed air or a vacuum cleaner to remove dirt. 5. Carefully inspect the filter for holes or tears and replace it if damaged. 6. Orient the filter so the foam sealing strip is facing downward and then re-install the filterin the filter mounting slot (see Figure 5-1) at the bottom of the cabinet. 7. Re-tighten the two set screws to secure the filter to cabinet 8. Close the RU outdoor cabinet door. Table 5-10. Scheduled MaintenanceINTERVAL ITEM REQUIREMENT12 months RU outdoor cabinet filter* Remove and clean the RU outdoor cabinet filters. Refer to Section 5.2 for the required procedure. 60 months HU FansSTM FanLPA FanRemove and replace the cooling fans in the HU, STM, and LPA. Refer to specified section for the required procedures: HU see Section 5.3, Section 5.4, and LPA see Section 5.5. *Though it is not recommended that the RU be installed in a salt-air environment, if done so, clean the cabinet filter on a monthly basis instead of on a 12 month basis. In addition, the RU should be inspected for corrosion due to salt, particularly near the fans and around the connectors. The MTBF of the RU may be impacted if the RU is exposed to salt-air.
ADCP-75-158 • Issue 1 • July 2003 • Section 5: MaintenancePage 5-15© 2003, ADC Telecommunications, Inc.Figure 5-1. Cabinet Filter Removal and Replacement5.3 Host Unit Fan Replacement ProcedureThe HU is equipped with two cooling fans which are located on the right side of the HUenclosure. The cooling fans blow cool air into the enclosure. Heated air is exhausted through thevent openings on the left side of the enclosure. Replacement of the fans requires that the HU beturned off for a short period of time. Use the following procedure to remove and replace the HUcooling fans: 1. Before working on the HU or handling a fan, slip on an Electro-Static Discharge (ESD)wrist strap and connect the ground wire to an earth ground source. Wear the ESD wriststrap while completing each section of the fan installation procedure. 2. Notify the NOC or alarm monitoring system operator that the system is going offline. 3. Place the HU On/Off switch in the OFF position (press O). 4. Remove the six flat-head screws (requires TORX screwdriver with T10 bit) that secure thefan/grill assembly to the right side of the HU enclosure as shown in Figure 5-2. Savescrews for reuse. 5. Carefully withdraw the fan/grill assembly from the enclosure until the wiring harness isexposed and the connectors are accessible. 6. Lift the small latch on each wiring harness connector and carefully unplug each connectorfrom the circuit board connector. Warning: Electronic components can be damaged by static electrical discharge. To preventESD damage, always wear an ESD wrist strap when working on the HU, STM, or LPA andwhen handling electronic components. 18614-BFILTER - PLACE FOAMSTRIP SIDE DOWNSET SCREWS
ADCP-75-158 • Issue 1 • July 2003 • Section 5: MaintenancePage 5-16© 2003, ADC Telecommunications, Inc.Figure 5-2. Host Unit Fan/Grill Assembly Removal7. Remove the plastic rivets that secure each fan to the grill by pushing outward on the rivetcenter post until the rivet can be withdrawn from the grill as shown in Figure 5-3. Figure 5-3. Removing Host Unit Fans From Grill8. Remove both fans from the grill9. Use the rivets removed in step 7 to secure the replacement fans to the grill. Orient each fanso the wiring harness is on the top and the arrow on the fan points into the enclosure. 10. Connect the two wiring harness connectors to the circuit board connectors. 11. Secure the fan/grill assembly to the side of the enclosure (see Figure 5-2) using the sixflat-head screws removed in step 4. 12. Place the HU On/Off switch in the ON position (press I). 13. Verify that the fans run properly following power-up. 14. Notify the NOC or alarm monitoring system operator that the system is going back online. 18615-A16173-B
ADCP-75-158 • Issue 1 • July 2003 • Section 5: MaintenancePage 5-17© 2003, ADC Telecommunications, Inc.5.4 Spectrum Transport Module Fan Replacement ProcedureThe STM is equipped with a rear-mounted cooling fan. The rear fan exhausts heated air fromthe STM housing. Replacement of the fan requires that the STM be turned off for a short periodof time and that the STM be removed from the outdoor cabinet or indoor mounting shelf. Usethe following procedure to remove and replace the STM cooling fan. 1. Before working on the STM or handling a fan, slip on an Electro-Static Discharge (ESD)wrist strap and connect the ground wire to an earth ground source. Wear the ESD wriststrap while completing each section of the fan installation procedure. 2. Notify the NOC or alarm monitoring system operator that the system is going offline. 3. Place the STM On/Off switch in the OFF position (press O). 4. Disconnect the various power, fiber optic, service, alarm wiring, and coaxial cableconnectors from the STM front panel as specified in Figure 5-4. Figure 5-4. Spectrum Transport Module Cable Connections5. Loosen the captive screws that secure the STM to the RU outdoor cabinet or indoormounting shelf and carefully withdraw the STM from its mounting slot. 6. Remove the four pan-head screws (requires TORX screwdriver with T10 bit) that securethe fan/grill assembly to rear side of the STM housing as shown in Figure 5-5. Save screwsfor reuse. Warning: Electronic components can be damaged by static electrical discharge. To preventESD damage, always wear an ESD wrist strap when working on the HU, STM, or LPA andwhen handling electronic components. 18661-ADisconnect ACpower connector Disconnect alarmconnectorDisconnect antennaconnector12345Disconnect optical fiberconnectors. Place a dustcap over each cableconnector and port adapter.Disconnect serviceconnector (if present)18661-ADisconnect ACpower connector Disconnect alarmconnectorDisconnect antennaconnector12345Disconnect optical fiberconnectors. Place a dustcap over each cableconnector and port adapter.Disconnect serviceconnector (if present)
ADCP-75-158 • Issue 1 • July 2003 • Section 5: MaintenancePage 5-18© 2003, ADC Telecommunications, Inc.Figure 5-5. STM Fan/Grill Assembly Removal7. Carefully withdraw the fan/grill assembly from the STM housing until the wiring harnessis exposed and the connector is accessible. 8. Lift the small latch on the wiring harness connector and carefully unplug the connectorfrom the circuit board connector. 9. Remove the plastic rivets that secure the fan to the mounting plate and grill by pushingoutward on the rivet center post until the rivet can be withdrawn as shown in Figure 5-6. 10. Separate fan from the mounting plate and grillFigure 5-6. Removing STM Fan From Mounting Plate and Grill16992-A16993-A
ADCP-75-158 • Issue 1 • July 2003 • Section 5: MaintenancePage 5-19© 2003, ADC Telecommunications, Inc.11. Use the rivets removed in step 9 to secure the replacement fan to the mounting plate andgrill. Orient the fan so the wiring harness is on the top and the arrow on the fan pointsaway from the enclosure. Make certain the rubber grommets are left in place on themounting plate. 12. Connect the wiring harness connector to the circuit board connector. 13. Secure the fan/grill assembly to the back of the housing (see Figure 5-5) using the fourpan-head screws removed in step 6. Do not overtighten the screws. The screw threads canbe easily stripped if too much torque is used to tighten the screws. 14. Re-install the STM in the outdoor cabinet or indoor mounting shelf and then re-connect allcables in the reverse order in which they were disconnected (see Figure 5-4). 15. Place the STM On/Off switch in the ON position (press I). 16. Verify that the fan runs properly following power-up. 17. Notify the NOC or alarm monitoring system operator that the system is going back online. 5.5 Linear Power Amplifier Fan Replacement ProcedureThe LPA is equipped with a front-mounted cooling fan. The fan draws cool air into the LPAhousing. Replacement of the fan requires that the STM be turned off for a short period of timeand that the LPA be removed from the outdoor cabinet or indoor mounting shelf. Use thefollowing procedure to remove and replace the LPA cooling fan. 1. Before working on the LPA or handling a fan, slip on an Electro-Static Discharge (ESD)wrist strap and connect the ground wire to an earth ground source. Wear the ESD wriststrap while completing each section of the fan installation procedure. 2. Notify the NOC or alarm monitoring system operator that the system is going offline. 3. Place the STM On/Off switch in the OFF position (press O). 4. Loosen the captive screws that secure the LPA to the RU outdoor cabinet or indoormounting shelf and carefully withdraw the LPA from its mounting slot. 5. Remove the four Phillips-head screws that secure the fan/front panel assembly to the frontof the LPA housing as shown in Figure 5-7. Save screws for reuse. 6. Carefully withdraw the fan/front panel assembly from the LPA housing until the wiringharness is exposed and the connector is accessible. 7. Carefully unplug the fan wiring harness connector from the LPA wiring harness connector. 8. Remove the screws, split-washers, and nuts that secure the fan and grill to the LPA frontpanel as shown in Figure 5-8. 9. Separate the fan and grill from the front panel. Warning: Electronic components can be damaged by static electrical discharge. To preventESD damage, always wear an ESD wrist strap when working on the HU, STM, or LPA andwhen handling electronic components.
ADCP-75-158 • Issue 1 • July 2003 • Section 5: MaintenancePage 5-20© 2003, ADC Telecommunications, Inc.Figure 5-7. LPA Fan/Front Panel Assembly RemovalFigure 5-8. Removing LPA Fan From Front Panel10. Use the screws, split-washers, and nuts removed in step 8 to secure the replacement fanand grill to the front panel. Orient the fan so the wiring harness is on the right side and thearrow on the fan points toward the rear of the housing. 11. Connect the fan wiring harness connector to the LPA wiring harness connector. 12. Secure the fan/front panel assembly to the front of the LPA housing using the fourPhillips-head screws removed in step 5. Do not overtighten the screws. The screw threadscan be easily stripped if too much torque is used to tighten the screws. 13. Re-install the LPA in the outdoor cabinet or indoor mounting shelf. 18769-APHILLIPSHEAD SCREW(4 PLACES)SPLIT WASHERAND NUT(4 PLACES)ARROW MUSTPOINT TOWARDENCLOSURE18768-A
ADCP-75-158 • Issue 1 • July 2003 • Section 5: MaintenancePage 5-21© 2003, ADC Telecommunications, Inc.14. Place the STM On/Off switch in the ON position (press I)15. Verify that the fan operates properly. The fan should exhaust air from the rear side of theLPA. 16. Notify the NOC or alarm monitoring system operator that the system is going back online.
ADCP-75-158 • Issue 1 • July 2003 • Section 5: MaintenancePage 5-22© 2003, ADC Telecommunications, Inc.Blank
ADCP-75-158 • Issue 1 • July 2003 • Section 6: General InformationPage 6-1© 2003, ADC Telecommunications, Inc.SECTION 6: GENERAL INFORMATION1 WARRANTY/SOFTWARE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-12 SOFTWARE SERVICE AGREEMENT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-13 REPAIR/EXCHANGE POLICY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-14 REPAIR CHARGES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-25 REPLACEMENT/SPARE PRODUCTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-26 RETURNED MATERIAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-27 CUSTOMER INFORMATION AND ASSISTANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-3_________________________________________________________________________________________________________1 WARRANTY/SOFTWAREThe Product and Software warranty policy and warranty period for all ADC Products ispublished in ADC’s Warranty/Software Handbook. Contact the Technical Assistance Center at1-800-366-3891, extension 73475 (in U.S.A. or Canada) or 952-917-3475 (outside U.S.A. andCanada) for warranty or software information or for a copy of the Warranty/SoftwareHandbook.2 SOFTWARE SERVICE AGREEMENTADC software service agreements for some ADC Products are available at a nominal fee.Contact the Technical Assistance Center at 1-800-366-3891, extension 73475 (in U.S.A. orCanada) or 952-917-3475 (outside U.S.A. and Canada) for software service agreementinformation.3 REPAIR/EXCHANGE POLICYAll repairs of ADC Products must be done by ADC or an authorized representative. Anyattempt to repair or modify ADC Products without written authorization from ADC voids thewarranty.If a malfunction cannot be resolved by the normal troubleshooting procedures, call theTechnical Assistance Center at 1-800-366-3891, extension 73475 (in U.S.A. or Canada) or952-917-3475 (outside U.S.A. and Canada). A telephone consultation can sometimes resolve aproblem without the need to repair or replace the ADC Product.If, during a telephone consultation, ADC determines the ADC Product needs repair, ADC willauthorize the return of the affected Product for repair and provide a Return MaterialAuthorization number and complete return shipping instructions. If time is critical, ADC canarrange to ship the replacement Product immediately. In all cases, the defective Product must becarefully packaged and returned to ADC.Content Page
ADCP-75-158 • Issue 1 • July 2003 • Section 6: General InformationPage 6-2© 2003, ADC Telecommunications, Inc.4 REPAIR CHARGESIf the defect and the necessary repairs are covered by the warranty, and the applicable warrantyperiod has not expired, the Buyer’s only payment obligation is to pay the shipping cost to returnthe defective Product. ADC will repair or replace the Product at no charge and pay the returnshipping charges.Otherwise, ADC will charge a percentage of the current Customer Product price for the repairor NTF (No Trouble Found). If an advance replacement is requested, the full price of a new unitwill be charged initially. Upon receipt of the defective Product, ADC will credit Buyer with 20percent of full price charged for any Product to be Out-of-Warranty. Products must be returnedwithin thirty (30) days to be eligible for any advance replacement credit. If repairs necessitate avisit by an ADC representative, ADC will charge the current price of a field visit plus round triptransportation charges from Minneapolis to the Buyer’s site.5 REPLACEMENT/SPARE PRODUCTSReplacement parts, including, but not limited to, button caps and lenses, lamps, fuses, and patchcords, are available from ADC on a special order basis. Contact the Technical Assistance Centerat 1-800-366-3891, extension 73475 (in U.S.A. or Canada) or 952-917-3475 (outside U.S.A.and Canada) for additional information.Spare Products and accessories can be purchased from ADC. Contact Sales Administration at1-800-366-3891, extension 73000 (in U.S.A. or Canada) or 1-952-938-8080 (outside U.S.A.and Canada) for a price quote and to place your order.6 RETURNED MATERIALContact the ADC Product Return Department at 1-800-366-3891, extension 73748 (in U.S.A. orCanada) or 952-917-3748 (outside U.S.A. and Canada) to obtain a Return MaterialAuthorization number prior to returning an ADC Product.All returned Products must have a Return Material Authorization (RMA) number clearlymarked on the outside of the package. The Return Material Authorization number is valid for 90days from authorization.
Page 6-3ADCP-75-158 • Issue 1 • July 2003 • Section 6: General Information7 CUSTOMER INFORMATION AND ASSISTANCE© 2003, ADC Telecommunications, Inc.All Rights ReservedPrinted in U.S.A .13944-JWRITE:ADC TELECOMMUNICATIONS, INCPO BOX 1101,MINNEAPOLIS, MN 55440-1101, USAADC TELECOMMUNICATIONS (S'PORE) PTE. LTD.100 BEACH ROAD, #18-01, SHAW TOWERS.SINGAPORE 189702.ADC EUROPEAN CUSTOMER SERVICE, INCBELGICASTRAAT 2,1930 ZAVENTEM, BELGIUMPHONE:EUROPESales Administration: +32-2-712-65 00Technical Assistance: +32-2-712-65 42EUROPEAN TOLL FREE NUMBERSUK: 0800 960236Spain: 900 983291France: 0800 914032Germany: 0180 2232923U.S.A. OR CANADASales: 1-800-366-3891 Extension 73000Technical Assistance: 1-800-366-3891 Extension 73475ASIA/PACIFICSales Administration: +65-6294-9948Technical Assistance: +65-6393-0739ELSEWHERESales Administration: +1-952-938-8080Technical Assistance: +1-952-917-3475PRODUCT INFORMATION AND TECHNICAL ASSISTANCE:Contents herein are current as of the date of publication. ADC reserves the right to change the contents without prior notice.In no event shall ADC be liable for any damages resulting from loss of data, loss of use, or loss of profits and ADC furtherdisclaims any and all liability for indirect, incidental, special, consequential or other similar damages. This disclaimer ofliability applies to all products, publications and services during and after the warranty period. This publication may beverified at any time by contacting ADC's Technical Assistance Center. euro_tac@adc.comasiapacific_tac@adc.comconnectivity_tac@adc.com
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