ADC Telecommunications DVLRCS800 Digivance Long Range Coverage Solution 800 MHz Sys User Manual 75124

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FCC ID: F8I-DVLRCS800 - User Manual Part 5
ADCP-75-124 • Issue B • April 2002 • Section 4: Operation
Right-click here to
open the Host Rev Att
pop-up screen
Right-click here to
open the Host Div Rev
Att pop-up screen
Figure 4-12. HOST RF Display
5. Right-click on the Host Rev Att section of the display (see Figure 4-12). The Host Rev
Att pop-up screen will open as shown in Figure 4-13.
Figure 4-13. Host Rev Att Pop-Up Screen
6. Enter the attenuation value that will provide the required gain. Refer to Table 4-2 for the
attenuation values and the corresponding gain values.
7.
Click OK to close the pop-up screen and to make the changes take effect.
8. Repeat the process for the diversity reverse path by right-clicking on the Host Div Rev Att
section (see Figure 4-12) and then entering the required attenuation value in the Host Div
Rev Att pop-up screen.
9.
Click OK to close the pop-up screen and to make the changes take effect.
Page 4-16
© 2002, ADC Telecommunications, Inc.
ADCP-75-124 • Issue B • April 2002 • Section 4: Operation
Table 4-2. Reverse Path Setting
ATTENUATION
SETTING
GAIN
PROVIDED
0 dB →
2.9
ATTENUATION
SETTING
11 dB →
30 dB
GAIN
PROVIDED
ATTENUATION
SETTING
GAIN
PROVIDED
19 dB
22 dB →
8 dB
1 dB
29 dB
12 dB
18 dB
23 dB
7 dB
2 dB
28 dB
13 dB
17 dB
24 dB
6 dB
3 dB
27 dB
14 dB
16 dB
25 dB
5 dB
4 dB
26 dB
15 dB
15 dB
26 dB
4 dB
5 dB
25 dB
16 dB
14 dB
27 dB
3 dB
6 dB
24 dB
17 dB
13 dB
28 dB
2 dB
7 dB
23 dB
18 dB
12 dB
29 dB
1 dB
8 dB
22 dB
19 dB
11 dB
30 dB
0 dB
9 dB
21 dB
20 dB
10 dB
--
--
10 dB
20 dB
21 dB
9 dB
--
--
Enter Host Forward and Reverse Delay
The forward and reverse delay function allows entry of from 0 to 63 µsec of delay in the
forward and reverse paths. This feature is used when multiple systems are used to transport the
same channel and there is a significant difference in the path delay between systems. Additional
delay may be entered to balance the overall system delay. The amount of delay required must be
calculated by the RF engineer and should be included in the system design plan. The default
setting is 0 µsec. Use the following procedure to change the forward and reverse path delay:
1. Click on the HOST RF tab. The HOST RF display will open within the EMS main
window as shown in Figure 4-14.
Right-click here to
open the Host Fwd
Delay pop-up screen
Right-click here to
open the Host Rev
Delay pop-up screen
Right-click here to
open the Host Div Rev
Delay pop-up screen
Figure 4-14. HOST RF Display
Page 4-17
© 2002, ADC Telecommunications, Inc.
ADCP-75-124 • Issue B • April 2002 • Section 4: Operation
2. Right-click on the Host Fwd Delay section of the display (see Figure 4-14). The Host
Fwd 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.
4. Enter the forward path delay value and click OK to close the pop-up screen and to make
the changes take effect.
5. Repeat the process for reverse delay and diversity reverse delay by right-clicking on the
appropriate delay section (see Figure 4-14) and then entering the required delay value in
the 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
Page 4-18
© 2002, ADC Telecommunications, Inc.
ADCP-75-124 • Issue B • April 2002 • Section 5: Maintenance
SECTION 5: MAINTENANCE
SYSTEM MAINTENANCE OVERVIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1
FAULT DETECTION AND ALARM REPORTING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-2
FAULT ISOLATION AND TROUBLESHOOTING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-6
TEST PROCEDURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-11
1.1
Tools and Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1
4.1
Optical Power Test. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-11
4.2
Optical Loopback Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-12
MAINTENANCE PROCEDURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-13
5.1
Scheduled Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-14
5.2
Remote Unit Cabinet Filter Cleaning Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-14
5.3
Host Unit Fan Replacement Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-15
5.4
Spectrum Transport Module Fan Replacement Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-17
5.5
Linear Power Amplifier Fan Replacement Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-19
_________________________________________________________________________________________________________
SYSTEM MAINTENANCE OVERVIEW
This section explains the Digivance LRCS fault detection and alarm reporting system, provides
a method for isolating and troubleshooting faults, and provides test and maintenance
procedures. The Digivance LRCS requires minimal regular maintenance to insure continuous
and satisfactory operation. Components that require regular replacement, cleaning, or testing
include the HU and RU fans and the RU air-filter and back-up battery,
Maintenance also includes diagnosing and correcting service problems as they occur. When an
alarm is reported, it will be necessary to follow a systematic troubleshooting procedure to locate
the problem. Once the source of the problem is isolated, the appropriate corrective action can be
taken to restore service. The only internal components that can be replaced are the cooling fans
which mount in the HU, RU, and LPA. The failure of any other component within a unit will
required replacement of that unit.
1.1
Tools and Materials
The following tools and materials are required in order to complete the procedures in this
section:
•
•
•
•
•
•
•
ESD wrist strap
IR filtering safety glasses
Patch cords with SC connectors
15 dB in-line SC optical attenuators
Optical power meter (1550 and 1310 nm)
Laser light source
TORX screwdriver (with T10 bit)
Page 5-1
© 2002, ADC Telecommunications, Inc.
ADCP-75-124 • Issue B • April 2002 • Section 5: Maintenance
• Battery maintenance tools (see PRC-SERIES OPERATING AND FIELD SERVICE
MANUAL for tool recommendations)
FAULT DETECTION AND ALARM REPORTING
The Digivance LRCS on-board embedded software detects various unit and system faults and
reports them as either Major or Minor alarms. A Major alarm indicates that the system has
failed in a way that directly affects RF transport performance. This usually means that some
calls or perhaps all calls cannot be made over the system. A Minor alarm means that system
performance 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, diversity
path failure, and an external minor fault (user defined fault). All other faults are reported as a
Major alarm.
Reporting of Major and Minor alarms is accomplished through the HU alarm contacts, the unit
front panel LED’s, the EMS software Graphical User Interface (GUI), and the Network
Operations Center - Network Element Manager (NOC/NEM) interface.
The HU is equipped with a set of both normally open (NO) and normally closed (NC) alarm
contacts which are used to report both Major and Minor alarms to an external alarm system. The
alarm contacts summarize the inputs so that any Major or Minor alarm will trigger an alarm
report to the external alarm system.
The HU, STM, and LPA front panel LED indicators are used to report specific alarms which are
reflected in the LED colors: Green, Red, Yellow, and Off. In addition to LED indicators, the
LPA is also equipped with a Digital Display that provides status messages. A description of the
Host Unit, Spectrum Transport Module, and Linear Power Amplifier LED indicators is
provided respectively in Table 5-1, Table 5-2, and Table 5-3.
The EMS software GUI provides both a summary and a more detailed list of alarm information
that includes unit and module level faults, circuit faults, and measured value faults such as
voltages, RF power, and temperature. A summary showing a list of all systems and their current
alarm status is presented through the Alarm OverView display. A detailed list of alarm
information is presented through the HOST alarm display and the REMOTE alarm display. All
the inputs that the system reports as alarms are shown in the HOST and REMOTE alarm
displays.
The NOC/NEM interface provides the same summary and detailed list of alarm information as
the 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
command GET ALARM ALL for a specific system will produce a detailed list of alarm
information for the specified system.
Page 5-2
© 2002, ADC Telecommunications, Inc.
ADCP-75-124 • Issue B • April 2002 • Section 5: Maintenance
Table 5-1. Host Unit LED Indicators
INDICATOR
COLOR
DESCRIPTION
Green
Off
Indicates if the HU is powered or un-powered.
The DC power source is on.
The DC power source is off.
POWER
STANDBY
Indicates if the HU is in the standby, normal, test, or program load mode.
Green (blinking) The HU is in the standby mode.
Yellow (blinking) The HU is in the program load mode.
Red (blinking)
The HU is in the test mode.
Off
The HU is in the normal mode.
HOST UNIT
Green
Yellow
Red
Indicates if the HU is normal, overheated, or faulty.
The HU is normal.
High temperature detected in HU.
Internal fault detected in the HU or HU/RU band mismatch.
Green
Yellow
Red
Indicates 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.
Green
Yellow
Red
Indicates if the forward path RF signal level is normal,
above overdrive threshold, or below underdrive threshold.
The RF signal level is normal
The RF signal level is below the underdrive threshold.
The RF signal level is above the overdrive threshold.
REMOTE UNIT
DRIVE
PORT 1/PORT 2
Green
Red
PORT 3
(diversity units
only)
Green
Yellow
Indicates if the reverse path optical signal received from
the RU is normal, if no signal is detected, or if errors are
detected.
The reverse path optical signal is normal.
No reverse path optical signal is received, excessive errors are
detected, or HU can’t communicate with the STM.
Indicates if the diversity reverse path optical signal
received from the RU is normal, if no signal is detected, or
if errors are detected.
The diversity reverse path optical signal is normal.
No diversity reverse path optical signal is received or excessive errors are detected.
Page 5-3
© 2002, ADC Telecommunications, Inc.
ADCP-75-124 • Issue B • April 2002 • Section 5: Maintenance
Table 5-2. Spectrum Transport Module LED Indicators
INDICATOR
COLOR
DESCRIPTION
Green
Red
Indicates 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.
AC POWER
STANDBY
Indicates if the STM is in the standby, normal, test, or program load mode.
Green (blinking) The STM is in the standby mode.
Yellow (blinking) The STM is in the program load mode.
Red (blinking)
The STM is in the test mode.
Off
The STM is in the normal mode.
HOST UNIT
Green
Yellow
Red
Indicates 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.
Green
Yellow
Red
Indicates if the STM is normal or faulty.
The STM is normal.
The STM is over temperature or the fan has failed.
Internal fault detected in the STM or HU/RU band mismatch.
Green
Yellow
Red
Indicates 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.
Green
Red
Indicates if the forward path VSWR is above or below the
threshold.
The VSWR is below the threshold.
The VSWR is above the threshold.
STM
PA
VSWR
PORT 1/PORT 2
Green
Red
PORT 3
(diversity units
only)
Green
Yellow
Page 5-4
© 2002, ADC Telecommunications, Inc.
Indicates if the forward path optical signal received from
the HU is normal, if no signal is detected, or if errors are
detected.
The forward path optical signal is normal.
No forward path optical signal is received, excessive errors are
detected, or the STM can’t communicate with the HU.
Indicates if the diversity reverse path optical signal
received by the HU is normal, if no signal is detected, or if
errors are detected.
The diversity reverse path optical signal is normal.
No diversity reverse path optical signal is received or excessive errors are detected.
ADCP-75-124 • Issue B • April 2002 • Section 5: Maintenance
Table 5-3. Linear Power Amplifier LED Indicators and Digital Display
INDICATOR
COLOR
DESCRIPTION
Off
Yellow
Indicates if the LPA is normal or faulty.
The LPA is normal.
Internal fault detected in the LPA.
Off
Red
Indicates if the LPA has an RF output or if the RF output
is shutdown.
The LPA RF output is on.
The LPA RF output is shutdown.
FAIL
SHUTDOWN
DISPLAY MESSAGE
DESCRIPTION
ADC850
0 ALARMS
NORMAL OPERATION
The LPA is normal.
HUNG CHANG
ADC-850M
Appears every time power is turned on.
RESTART AT STAND
ALONE MODE
Appears when LPA is reset.
ADC-850S
Appears when an alarm has turned off and the LPA is restarting after the RESET button has been pressed or the reset command has been supplied from an external source.
PLEASE WAIT WHILE
RESTARTING
Appears while the LPA processor is rebooting.
DC +12V: +12.0V
DC +27V: +27.0V
DC +32V: +32.0V
DC -12V: -12.0V
Alternately displays the voltage flow in each part of the LPA.
TEMPER 100.0 ºC
Indicates the current temperature of the LPA heat sink.
OVER POWER ALARM
Output power has exceeded 100 W.
HIGH TEMPERATURE
Alarm: Temperature of LPA exceeds 85 ºC.
VSWR ALARM
Reflected LPA power exceeds 20 W.
LOOP FAIL
General fault occurred in the LPA loops.
FANFAIL
One or more fans have failed.
FORCED SHUTDOWN
The RF ON/OFF switch is in the OFF position or the LPA was
set in the disable mode through the EMS computer.
Alternating FORCED SHUTDOWN
and alarm message
An alarm has remained for over 5 seconds.
DC FAIL
+12V
-12V
+32V
Voltage is outside the preset ranges:
+11 to +13V
-13 to -11V
+30 to +34V
Page 5-5
© 2002, ADC Telecommunications, Inc.
ADCP-75-124 • Issue B • April 2002 • Section 5: Maintenance
FAULT ISOLATION AND TROUBLESHOOTING
Alarm information may be accessed and faults isolated using the information provided by the
unit front panel LED indicators, the EMS software GUI alarm displays, or the NOC-EMS
interface. Because the alarm information provided by the EMS GUI and the NOC-EMS
interface is very detailed, refer to Table 5-4, Table 5-5, or Table 5-6 to determine the unit LED
indicator (Host Unit or Remote Unit) that corresponds to the indicated alarm. Then refer to
Table 5-7 or Table 5-8 to identify the problem, check out the possible causes, and take
corrective action.
Table 5-4. Host Unit Major and Minor Alarms
MAJOR ALARM
LED INDICATOR
MAJOR ALARM
LED INDICATOR
Operating Mode
(Does not apply)
Fwd Synth Lock
HOST UNIT
8 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
PORT 1/PORT 2
Pri Rev Synth Lock
HOST UNIT
Overdrive
DRIVE
Temperature
HOST UNIT
Unit Mismatch
HOST UNIT
Sec No Light
PORT 3
Link Alarm
(Does not apply)
Sec Errors
PORT 3
3.8 Volt
HOST UNIT
Sec Rev Synth Lock
HOST UNIT
Pri Laser Fail
HOST UNIT
Underdrive
DRIVE
Pri Errors
PORT 1/PORT 2
Minor Extern Output
(Does not apply)
MINOR ALARMS
LED INDICATOR
Table 5-5. Remote Unit Major Alarms
MAJOR ALARM
LED INDICATOR
MAJOR ALARM
LED INDICATOR
Operating Mode
(Does not apply)
Battery Voltage
STM
3.8 Volt
STM
Pri Laser Fail
STM
Pri Errors
PORT 1/PORT 2
Fwd Synth Lock
STM
Reference Synth Lock
STM
System VSWR
VSWR
LPA DC Fail
PA
LPA Low Power
PA
LPA VSWR
PA
Unit Mismatch
STM
Link Alarm
(Does not apply)
Converter
STM
AC Fail
AC POWER
Pri No Light
PORT 1/PORT 2
8 Volt
STM
Pri Rev Synth Lock
STM
Pri Rev Mux Lock
STM
LPA Detect
PA
RF Mute
(Does not apply)
LPA Over Power
PA
LPA Loop Failed
PA
Companion Lost
PORT 1/PORT 2
Major Extern Alarm Inp (Does not apply)
Page 5-6
© 2002, ADC Telecommunications, Inc.
–
–
ADCP-75-124 • Issue B • April 2002 • Section 5: Maintenance
Table 5-6. Remote Unit Minor Alarms
MINOR ALARM
LED INDICATOR
MINOR ALARM
LED INDICATOR
Temperature
STM
Sec Laser Fail
STM
Sec Rev Mux Lock
STM
Sec Rev Synth Lock
STM
Rev Path Level
(Does not apply)
LPA Disable
SHUTDOWN (LPA)
LPA Fan
PA
LPA High Temp
PA
RF Out Very Low
(Does not apply)
Minor Extern Alarm Inp (Does not apply)
During normal HU operation, all LED’s should be green except the STANDBY LED which
should be Off. When a Minor alarm occurs, one or more of the LED’s will turn yellow. When a
Major alarm occurs, one or more of the LED’s will turn red.
Table 5-7. Host Unit Fault Isolation and Troubleshooting
Alarm Type
LED
Color
Minor
HOST UNIT
Yellow
PROBLEM: The HU is overheating.
POSSIBLE CAUSE
CORRECTIVE ACTION/COMMENTS
1. Air intake or exhaust opening to HU chassis
is blocked
2. Ambient temperature > 50º C/122º F.
3. Faulty fan.
1. Remove cause of air-flow blockage.
Alarm Type
LED
Color
Minor
REMOTE UNIT
Yellow
2. Reduce ambient temperature.
3. Replace HU fan (See Section 5.3).
PROBLEM: A minor alarm is detected at the RU.
POSSIBLE CAUSE
CORRECTIVE ACTION/COMMENTS
1. The STM or LPA is overheating.
1. Check RU for alarms and refer to Table 5-8
Alarm Type
LED
Color
Minor
DRIVE
Yellow
PROBLEM: The RF input signal level is below the underdrive threshold.
POSSIBLE CAUSE
CORRECTIVE ACTION/COMMENTS
1. Faulty coaxial connection between the
1. Check forward path signal level at the HU.
HU and the BTS.
2. Incorrect attenuation in forward path RF coax- 2. Check Host Forward Attenuator setting and
ial link.
adjust if attenuation is too high.
Page 5-7
© 2002, ADC Telecommunications, Inc.
ADCP-75-124 • Issue B • April 2002 • Section 5: Maintenance
Table 5-7. Host Unit Fault Isolation and Troubleshooting, continued
Alarm Type
LED
Color
Major
HOST UNIT
Red
PROBLEM: Internal fault detected in HU.
POSSIBLE CAUSE
CORRECTIVE ACTION/COMMENTS
1. HU and STM band mismatch.
2. The HU has failed.
1. Replace HU or STM with correct unit.
2. Replace the HU.
Alarm Type
LED
Color
Major
REMOTE UNIT
Red
PROBLEM: A major alarm is detected at the RU.
POSSIBLE CAUSE
CORRECTIVE ACTION/COMMENTS
1. The STM or LPA has failed, the STM is not
receiving a forward path optical signal, or the
RU cabinet door is open.
1. Check RU for alarms and refer to Table 5-8.
Alarm Type
LED
Color
Major
DRIVE
Red
PROBLEM: The RF signal is above the overdrive threshold.
POSSIBLE CAUSE
CORRECTIVE ACTION/COMMENTS
1. Incorrect attenuation in forward path RF
coaxial link.
1. Check Forward Attenuator setting and adjust if
attenuation is too low.
Alarm Type
LED
Color
Major
PORT 1/PORT 2
Red
PROBLEM: No reverse path optical signal is received or excessive errors are detected.
POSSIBLE CAUSE
CORRECTIVE ACTION/COMMENTS
1. Faulty reverse path optical link.
1. Test optical link. Clean connector if dirty. Repair
or replace optical fiber if faulty. (See Section 4.1).
2. Faulty optical transmit port at the HU or faulty 2. Test optical ports. Replace HU or STM if port is
optical receive port at the STM.
faulty (See Section 4.2).
Alarm Type
LED
Color
Minor
PORT 3
Yellow
PROBLEM: No diversity reverse path optical signal is received or excessive errors are detected.
POSSIBLE CAUSE
1. Faulty diversity reverse path optical link.
CORRECTIVE ACTION/COMMENTS
1. Test optical link. Clean connector if dirty. Repair
or replace optical fiber if faulty. (See Section 4.1)
2. Faulty optical transmit port at the HU or faulty 2. Test optical ports. Replace HU or STM if port is
optical receive port at the STM.
faulty (See Section 4.2).
Page 5-8
© 2002, ADC Telecommunications, Inc.
ADCP-75-124 • Issue B • April 2002 • Section 5: Maintenance
During normal STM operation, all LED’s should be green except the STANDBY LED which
should be Off. When a Minor alarm occurs, one or more of the LED’s will turn yellow. When a
Major alarm occurs, one or more of the LED’s will turn red.
During normal LPA operation, all LED’s should be Off.
Table 5-8. STM and LPA Fault Isolation and Troubleshooting
Alarm Type
LED
Color
Minor
STM
Yellow
PROBLEM: The STM is overheating.
POSSIBLE CAUSE
CORRECTIVE ACTION/COMMENTS
1. Air intake or exhaust opening to the remote
unit cabinet is blocked
2. Ambient temperature > 50º C/122º F.
3. Faulty fan.
1. Remove cause of air-flow blockage.
Alarm Type
LED
Color
Minor
HOST UNIT
Yellow
2. Reduce ambient temperature.
3. Replace STM fan (See Section 5.4).
Problem: A minor alarm is detected at the HU.
POSSIBLE CAUSE
CORRECTIVE ACTION/COMMENTS
1. The HU is overheating.
1. Check HU for alarms and refer to Table 5-7
Alarm Type
LED
Color
Minor
PA
Yellow
PROBLEM: The LPA is overheating.
POSSIBLE CAUSE
CORRECTIVE ACTION/COMMENTS
1. Air intake or exhaust opening to the remote
unit cabinet is blocked
2. Ambient temperature > 50º C/122º F.
3. Faulty fan.
1. Remove cause of air-flow blockage.
Alarm Type
LED
Color
Major
AC POWER
Red
2. Reduce ambient temperature.
3. Replace LPA fan (See Section 5.5).
PROBLEM: The RU is powered by the back-up battery system
POSSIBLE CAUSE
CORRECTIVE ACTION/COMMENTS
1. The AC power system circuit breaker is open
or the AC power has failed.
1. Check the AC power system, repair as needed,
and reset circuit breaker.
Alarm Type
LED
Color
Major
HOST UNIT
Red
PROBLEM: A major alarm is detected at the HU.
POSSIBLE CAUSE
CORRECTIVE ACTION/COMMENTS
1. The HU has failed.
1. Check HU for alarms and refer to Table 5-7.
Page 5-9
© 2002, ADC Telecommunications, Inc.
ADCP-75-124 • Issue B • April 2002 • Section 5: Maintenance
Table 5-8. STM and LPA Fault Isolation and Troubleshooting, continued
Alarm Type
LED
Color
Major
STM
Red
PROBLEM: Internal fault detected in STM.
POSSIBLE CAUSE
CORRECTIVE ACTION/COMMENTS
1. HU and STM band mismatch.
2. The STM has failed.
1. Replace HU or STM with correct unit.
2. Replace the STM.
Alarm Type
LED
Color
Major
PA
Red
PROBLEM: Internal fault detected in LPA.
POSSIBLE CAUSE
CORRECTIVE ACTION/COMMENTS
1. The LPA has failed.
1. Replace the LPA.
Alarm Type
LED
Color
Major
VSWR
Red
PROBLEM: The forward path VSWR is above the threshold.
POSSIBLE CAUSE
CORRECTIVE ACTION/COMMENTS
1. Faulty antenna.
1. Check the antenna circuit for shorts or opens
(including lightning protector).
Alarm Type
LED
Color
Major
PORT 1/PORT 2
Red
PROBLEM: No forward path optical signal is received or excessive errors are detected.
POSSIBLE CAUSE
CORRECTIVE ACTION/COMMENTS
1. Faulty forward path optical link.
2. Faulty optical transmit port at the STM or
faulty optical receive port at the HU.
1. Test optical link. 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).
Alarm Type
LED
Color
Minor
PORT 3
Yellow
PROBLEM: No diversity reverse path optical signal is received by the HU or excessive errors are detected.
POSSIBLE CAUSE
CORRECTIVE ACTION/COMMENTS
1. Faulty diversity reverse path optical link.
2. Faulty optical transmit port at the STM or
faulty optical receive port at the HU.
1. Test optical link. 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).
Alarm Type
LED
Color
Major
FAIL
Yellow
PROBLEM: Internal fault detected in the LPA.
POSSIBLE CAUSE
CORRECTIVE ACTION/COMMENTS
1.The LPA has failed.
1. Replace LPA
Page 5-10
© 2002, ADC Telecommunications, Inc.
ADCP-75-124 • Issue B • April 2002 • Section 5: Maintenance
Table 5-8. STM and LPA Fault Isolation and Troubleshooting, continued
Alarm Type
LED
Color
Major
SHUTDOWN
Red
PROBLEM: The RF output from the LPA is shutdown.
POSSIBLE CAUSE
CORRECTIVE ACTION/COMMENTS
1.The RF ON/OFF switch is in the OFF position 1.Place RF ON/OFF switch in the ON position or
or the LPA was set in the disable mode through
enable the LPA.
the EMS computer.
2. Breaker switch on LPA is open
2. Reset breaker switch.
3. The LPA is faulty.
3. Replace LPA.
TEST PROCEDURES
This section provides procedures for common troubleshooting and maintenance tests. Refer to
these procedures as needed when specified in the Fault Isolation and Troubleshooting tables in
Section 3.
4.1
Optical Power Test
A break in an optical fiber or a fault with the optical connector will interrupt communications
between linked components or generate excessive errors. Use the following procedure to isolate
a problem with an optical fiber or connector.
Danger: This equipment uses a Class 1 Laser according to FDA/CDRH rules. Laser radiation
can seriously damage the retina of the eye. Do not look into the ends of any optical fiber. Do not
look 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 MUST
be immediately placed over any radiating transmitter or optical fiber connector to avoid the
potential of dangerous amounts of radiation exposure. This practice also prevents dirt particles
from entering the 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 switch in the OFF position (press O).
4. Disconnect the optical fiber connectors for the fiber to be tested at the HU and at the STM.
5. Inspect the optical connectors. Verify that each connector is clean and that no scratches or
imperfections are visible on the fiber end. Clean and polish the optical connector if
necessary.
6. Connect a laser light source to one end of the optical fiber and an optical power meter to
the other end.
Page 5-11
© 2002, ADC Telecommunications, Inc.
ADCP-75-124 • Issue B • April 2002 • Section 5: Maintenance
7. Verify that the power loss is within specifications. The optical loss budget for 9/125,
single-mode fiber is 25 dB (for BER of 10-6). The optical power level should not exceed –
15 dBm to avoid overdriving the optical receiver. If the power loss is not within
specifications, repair or replace the optical fiber and/or connector per local practice.
8. Repeat steps 3 through 6 for each optical fiber that requires testing.
9. Reconnect the optical fibers at the HU and the STM.
10. When ready to put the system back into service, place the On/Off switch in the ON
position (press I) at both the HU and STM.
11. Notify the NOC or alarm monitoring service that the system is going back online.
4.2
Optical Loopback Test
A faulty optical port, a break in an optical fiber, or a fault in an optical connector will interrupt
communications between fiber linked components. The following procedures provide tests to
determine if a fault exists with the primary optical ports (PORT 1/PORT 2) or with the
secondary optical port (PORT 3).
Danger: This equipment uses a Class 1 Laser according to FDA/CDRH rules. Laser radiation
can seriously damage the retina of the eye. Do not look into the ends of any optical fiber. Do not
look 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 MUST
be immediately placed over any radiating transmitter or optical fiber connector to avoid the
potential of dangerous amounts of radiation exposure. This practice also prevents dirt particles
from entering the connector.
4.2.1
PORT 1/PORT 2 Loopback Test
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 or STM (whichever unit is being tested), 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 and
place 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/PORT 2
LED indicator.
8. The PORT 1/PORT 2 LED indicator will turn either red or green. If the LED turns red, the
primary optical transmitter or receiver is faulty. Replace the unit and then recheck system
operation. If the LED turns green, the optical ports are good.
9. Place the On/Off switch in the OFF position (press O).
10. Remove the optical attenuator from the PORT 1 optical port.
Page 5-12
© 2002, ADC Telecommunications, Inc.
ADCP-75-124 • Issue B • April 2002 • Section 5: Maintenance
11. Remove the dust caps from the optical fiber connectors.
12. Clean each connector (follow connector supplier’s recommendations) and then insert each
connector into the appropriate optical port.
13. When ready to put the unit back into service, place the On/Off switch in the ON position
(press I).
14. Notify the NOC or alarm monitoring service that the system is going back online.
4.2.2
PORT 3 Loopback Test
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 or STM (whichever unit is being tested), place the On/Off switch in the OFF
position (press O).
4. Disconnect the optical fiber connectors from the PORT 1 and PORT 3 optical ports and
place a dust cap over each connector.
5. Plug a 15 dB in-line optical attenuator into the PORT 3 optical port.
6. Connect a patch cord between the optical attenuator and the PORT 1 optical port.
7. Place the On/Off switch in the ON position (press I) and observe the PORT 3 LED
indicator.
8. The PORT 3 LED indicator will turn either red or green. If the LED turns yellow, the
secondary optical transmitter or receiver is faulty. Replace the unit and then recheck
system operation. If the LED turns green, the optical ports are good.
9. Place the On/Off switch in the OFF position (press O).
10. Remove the optical attenuator from the PORT 3 optical port.
11. Remove the dust caps from the optical fiber connectors.
12. Clean each connector (follow connector supplier’s recommendations) and then insert each
connector into the appropriate optical port.
13. When ready to put the unit back into service, place the On/Off switch in the ON position
(press I).
14. Notify the NOC or alarm monitoring service that the system is going back online.
MAINTENANCE PROCEDURES
This section specifies the system maintenance requirements and provides the procedures for the
required maintenance tasks. Refer to these procedures as needed when specified in the
Scheduled Maintenance table.
Page 5-13
© 2002, ADC Telecommunications, Inc.
ADCP-75-124 • Issue B • April 2002 • Section 5: Maintenance
5.1
Scheduled Maintenance
Table 5-9 lists the items that require regular maintenance and the recommended maintenance
interval. Refer to the section specified in the table for the required maintenance or test
procedure.
Table 5-9. Scheduled Maintenance
INTERVAL
ITEM
REQUIREMENT
1 month
Battery*
Check float voltage.
Check system ambient temperature.
Check system float current.
6 months
Battery*
Perform 1 month scheduled maintenance tasks.
Check individual battery terminal temperature.
Check individual battery float voltages.
12 months
Battery *
Perform 1 and 6 month scheduled maintenance tasks
Complete detailed physical inspection.
Re-torque terminal connections.
Perform general system maintenance.
Perform cabinet maintenance.
RU cabinet filter**
Remove and clean the RU cabinet filter. Refer to Section 5.2
for the required procedure.
24 months
Battery*
Perform 1, 6, and 24 month scheduled maintenance tasks.
Test battery system for rated capacity.
60 months
HU Fans
STM Fan
LPA Fans
Remove 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.
* Refer to the PRC-SERIES OPERATING AND FIELD SERVICE MANUAL (provided with the
back-up battery system) for the specified battery maintenance procedures.
**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.
5.2
Remote Unit Cabinet Filter Cleaning Procedure
The RU cabinet filter cleans the RU intake air before it enters the cabinet. The filter should 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 fan failures, it is
possible that the filter is dirty and requires cleaning. Use the following procedure to clean the
RU cabinet filter:
1. Open the RU cabinet door as shown in Figure 5-1.
2. Loosen the hex nuts that secure the left and right filter brackets to the cabinet door.
3. Pull the filter upward and away from the cabinet door. Be careful not to damage the gasket
that provides the air seal.
Page 5-14
© 2002, ADC Telecommunications, Inc.
ADCP-75-124 • Issue B • April 2002 • Section 5: Maintenance
LIFT AIR FILTER UP AND
AWAY FROM DOOR
LOOSEN HEX NUTS ON BOTH
SIDES OF AIR FILTER
16983-A
Figure 5-1. Air Filter Removal and Replacement
4. Gently tap the filter against your hand to dislodge the dirt. If necessary, use compressed air
or a vacuum cleaner to remove the dirt.
5. Re-install the filter in the door and tighten the hex nuts that secure the left and right
brackets to the door.
5.3
Host Unit Fan Replacement Procedure
The HU is equipped with two cooling fans which are located on the right side of the HU
enclosure. The cooling fans blow cool air into the enclosure. Heated air is exhausted through the
vent openings on the left side of the enclosure. Replacement of the fans requires that the HU be
turned off for a short period of time. Use the following procedure to remove and replace the HU
cooling 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 wrist
strap while completing each section of the fan installation procedure.
Warning: Electronic components can be damaged by static electrical discharge. To prevent
ESD damage, always wear an ESD wrist strap when working on the HU, STM, or LPA and
when handling electronic components.
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 the
fan/grill assembly to the right side of the HU enclosure as shown in Figure 5-2. Save
screws for reuse.
Page 5-15
© 2002, ADC Telecommunications, Inc.
ADCP-75-124 • Issue B • April 2002 • Section 5: Maintenance
16986-A
Figure 5-2. Host Unit Fan/Grill Assembly Removal
5. Carefully withdraw the fan/grill assembly from the enclosure until the wiring harness is
exposed and the connectors are accessible.
6. Lift the small latch on each wiring harness connector and carefully unplug each connector
from the circuit board connector.
7. Remove the plastic rivets that secure each fan to the grill by pushing outward on the rivet
center post until the rivet can be withdrawn from the grill as shown in Figure 5-3.
16173-B
Figure 5-3. Removing Host Unit Fans From Grill
8. Remove both fans from the grill
9. Use the rivets removed in step 7 to secure the replacement fans to the grill. Orient each fan
so 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 six
flat-head screws removed in step 4.
Page 5-16
© 2002, ADC Telecommunications, Inc.
ADCP-75-124 • Issue B • April 2002 • Section 5: Maintenance
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.
5.4
Spectrum Transport Module Fan Replacement Procedure
The STM is equipped with a rear cooling fan that exhausts heated air from the STM enclosure.
Cool air enters the STM through vent openings on the side of the enclosure. Replacement of the
fan requires that the STM be turned off for a short period of time and that the STM be removed
from the cabinet. Use the 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 wrist
strap while completing each section of the fan installation procedure.
Warning: Electronic components can be damaged by static electrical discharge. To prevent
ESD damage, always wear an ESD wrist strap when working on the HU, STM, or LPA and
when handling electronic components.
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 cable
connectors from the STM front panel as specified in Figure 5-4.
Disconnect optical fiber
connectors. Place a dust
cap over each cable
connector and port adapter.
Disconnect service
connector (if present)
Disconnect AC
power connector
Disconnect alarm
connector
Disconnect back-up battery
DC power connector
Disconnect diversity
antenna connector
(if present)
Disconnect antenna
connector
16991-A
Figure 5-4. Spectrum Transport Module Cable Connections
Page 5-17
© 2002, ADC Telecommunications, Inc.
ADCP-75-124 • Issue B • April 2002 • Section 5: Maintenance
5. Loosen the captive screws that secure the STM to the RU cabinet mounting shelf and
carefully withdraw the STM from the cabinet.
6. Remove the four pan-head screws (requires TORX screwdriver with T10 bit) that secure
the fan/grill assembly to rear side of the STM enclosure as shown in Figure 5-5. Save
screws for reuse.
16992-A
Figure 5-5. STM Fan/Grill Assembly Removal
7. Carefully withdraw the fan/grill assembly from the enclosure until the wiring harness is
exposed and the connector is accessible.
8. Lift the small latch on the wiring harness connector and carefully unplug the connector
from the circuit board connector.
9. Remove the plastic rivets that secure the fan to the mounting plate and grill by pushing
outward 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 grill
11. Use the rivets removed in step 9 to secure the replacement fan to the mounting plate and
grill. Orient the fan so the wiring harness is on the top and the arrow on the fan points
away from the enclosure. Make certain the rubber grommets are left in place on the
mounting plate.
12. Connect the wiring harness connector to the circuit board connector.
13. Secure the fan/grill assembly to the back of the enclosure (see Figure 5-5) using the four
pan-head screws removed in step 6. Do not overtighten the screws. The screw threads can
be easily stripped if too much torque is used to tighten the screws.
Page 5-18
© 2002, ADC Telecommunications, Inc.
ADCP-75-124 • Issue B • April 2002 • Section 5: Maintenance
16993-A
Figure 5-6. Removing STM Fan From Mounting Plate and Grill
14. Re-install the STM in the cabinet and then re-connect all cables 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 Procedure
The LPA is equipped with both a front and rear cooling fan. The front fan draws cool air into the
LPA enclosure and the rear fan exhausts heated air from the LPA enclosure. Replacement of the
fans requires that the STM be turned off for a short period of time and that the LPA be removed
from the cabinet. Use the following procedure to remove and replace the LPA cooling fans.
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 wrist
strap while completing each section of the fan installation procedure.
Warning: Electronic components can be damaged by static electrical discharge. To prevent
ESD damage, always wear an ESD wrist strap when working on the HU, STM, or LPA and
when handling electronic components.
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 cabinet mounting shelf and
carefully withdraw the LPA from the cabinet.
5. Pull out the four retainers that secure the front fan to the LPA as shown in Figure 5-7 and
same for reuse.
Page 5-19
© 2002, ADC Telecommunications, Inc.
ADCP-75-124 • Issue B • April 2002 • Section 5: Maintenance
PULL ON RETAINERS
TO REMOVE FAN
16994-A
Figure 5-7. LPA Fan Removal and Replacement
6. Carefully withdraw the fan assembly from the LPA until the wiring harness is exposed and
the RJ-45 wiring harness connector is accessible.
7. Disconnect the fan wiring harness connector from the LPA and lift the fan assembly away
from the LPA.
8. Place a small amount of anti-corrosion gel on the connector of the replacement fan
assembly.
9. Orient the fan assembly so the air-flow arrow points into the LPA.
10. Connect the fan assembly wiring harness connector to the LPA internal connector.
11. Secure the fan assembly to the LPA using the four retainers removed in step 5.
12. Replace the rear fan assembly using the same procedure covered in steps 5 through 11
except orient the rear fan so the air-flow arrow is pointing away from the LPA.
13. When both fan assemblies have been replaced, re-install the LPA in the cabinet.
14. Place the STM On/Off switch in the ON position (press I) and verify that both fans operate
properly. The front fan should draw air into the LPA and the rear fan should blow air out of
the LPA.
15. Notify the NOC or alarm monitoring system operator that the system is going back online.
Page 5-20
© 2002, ADC Telecommunications, Inc.
ADCP-75-124 • Issue B • April 2002 • Section 6: General Information
SECTION 6: GENERAL INFORMATION
Content
Page
WARRANTY/SOFTWARE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-1
SOFTWARE SERVICE AGREEMENT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-1
REPAIR/EXCHANGE POLICY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-1
REPAIR CHARGES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-2
REPLACEMENT/SPARE PRODUCTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-2
RETURNED MATERIAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-2
CUSTOMER INFORMATION AND ASSISTANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-3
_________________________________________________________________________________________________________
WARRANTY/SOFTWARE
The Product and Software warranty policy and warranty period for all ADC Products is
published in ADC’s Warranty/Software Handbook. Contact the Technical Assistance Center at
1-800-366-3891, extension 73475 (in U.S.A. or Canada) or 952-917-3475 (outside U.S.A. and
Canada) for warranty or software information or for a copy of the Warranty/Software
Handbook.
SOFTWARE SERVICE AGREEMENT
ADC 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. or
Canada) or 952-917-3475 (outside U.S.A. and Canada) for software service agreement
information.
REPAIR/EXCHANGE POLICY
All repairs of ADC Products must be done by ADC or an authorized representative. Any
attempt to repair or modify ADC Products without written authorization from ADC voids the
warranty.
If a malfunction cannot be resolved by the normal troubleshooting procedures, call the
Technical Assistance Center at 1-800-366-3891, extension 73475 (in U.S.A. or Canada) or
952-917-3475 (outside U.S.A. and Canada). A telephone consultation can sometimes resolve a
problem without the need to repair or replace the ADC Product.
If, during a telephone consultation, ADC determines the ADC Product needs repair, ADC will
authorize the return of the affected Product for repair and provide a Return Material
Authorization number and complete return shipping instructions. If time is critical, ADC can
arrange to ship the replacement Product immediately. In all cases, the defective Product must be
carefully packaged and returned to ADC.
Page 6-1
© 2002, ADC Telecommunications, Inc.
ADCP-75-124 • Issue B • April 2002 • Section 6: General Information
REPAIR CHARGES
If the defect and the necessary repairs are covered by the warranty, and the applicable warranty
period has not expired, the Buyer’s only payment obligation is to pay the shipping cost to return
the defective Product. ADC will repair or replace the Product at no charge and pay the return
shipping charges.
Otherwise, ADC will charge a percentage of the current Customer Product price for the repair
or NTF (No Trouble Found). If an advance replacement is requested, the full price of a new unit
will be charged initially. Upon receipt of the defective Product, ADC will credit Buyer with 20
percent of full price charged for any Product to be Out-of-Warranty. Products must be returned
within thirty (30) days to be eligible for any advance replacement credit. If repairs necessitate a
visit by an ADC representative, ADC will charge the current price of a field visit plus round trip
transportation charges from Minneapolis to the Buyer’s site.
REPLACEMENT/SPARE PRODUCTS
Replacement parts, including, but not limited to, button caps and lenses, lamps, fuses, and patch
cords, are available from ADC on a special order basis. Contact the Technical Assistance Center
at 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 at
1-800-366-3891, 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.
RETURNED MATERIAL
Contact the ADC Product Return Department at 1-800-366-3891, extension 73748 (in U.S.A. or
Canada) or 952-917-3748 (outside U.S.A. and Canada) to obtain a Return Material
Authorization number prior to returning an ADC Product.
All returned Products must have a Return Material Authorization (RMA) number clearly
marked on the outside of the package. The Return Material Authorization number is valid for 90
days from authorization.
Page 6-2
© 2002, ADC Telecommunications, Inc.
ADCP-75-124 • Issue B • April 2002 • Section 6: General Information
CUSTOMER INFORMATION AND ASSISTANCE
PHONE:
EUROPE
Sales Administration: +32-2-712-65 00
Technical Assistance: +32-2-712-65 42
U.S.A. OR CANADA
Sales: 1-800-366-3891 Extension 73000
Technical Assistance: 1-800-366-3891 Extension 73475
ELSEWHERE
Sales Administration: +1-952-938-8080
Technical Assistance: +1-952-917-3475
SYSTEM INTEGRATION DIVISION (SID)
800.366.3891 (press star and choose option 4) (US & Canada)
+1-952.917.3000 Ask for Systems Integration (Direct Dial)
WRITE:
U.S.A.
ADC TELECOMMUNICATIONS, INC
PO BOX 1101,
MINNEAPOLIS, MN 55440-1101, USA
U.S.A.
ADC EUROPEAN CUSTOMER SERVICE, INC
BELGICASTRAAT 2,
1930 ZAVENTEM, BRUSSELS, BELGIUM
PRODUCT INFORMATION AND TECHNICAL ASSISTANCE:
WWW.ADC.COM
technical@adc.com
13944-I
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 further
disclaims any and all liability for indirect, incidental, special, consequential or other similar damages. This disclaimer of
liability applies to all products, publications and services during and after the warranty period. This publication may be
verified at any time by contacting ADC's Technical Assistance Center.
© 2002, ADC Telecommunications, Inc.
All Rights Reserved
Printed in U.S.A .
Page 6-3
www.adc.com

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