UDS1-BD (UDS1 Interface Circuit Pack)
Issue 1 May 2002
8-1737
555-233-143
Internal Loop-Around Test (#135)
This test is destructive.
The Internal Loop-Around test is run by looping the transmitted DS1 bit stream
back into the UDS1 board’s receiver. The loop occurs just before the DS1 facility
interface. The test is highly destructive and can only be initiated by a
technician-demanded reset board UUCSS command.
Every trunk or port on the UDS1 Interface circuit pack must be busied out using
the technician’s busyout board command before running the Internal
Loop-Around test. When the Internal Loop-Around test is initiated, maintenance
software sends appropriate messages to the UDS1 Interface circuit pack to start
the test. The test uses the Tone Generator and Tone Detector to exercise a
bit-pattern consistency test for every port. If the transmitted and received bit
patterns on a trunk or port are different, the test fails.
When the test completes, the maintenance software sends a stop loop around
message to the UDS1 Interface circuit pack to put the circuit pack back into the
normal operation mode. Every trunk or port of the UDS1 Interface circuit pack is
restored to the in-service state after the release board command is entered.
Table 8-672.
Test #135 Internal Loop-Around Test
Error
Code
Test
Result
Description / Recommendation
1002
ABORT
The system could not allocate time slots for the test. The system may be under
heavy traffic conditions or it may have time slots out-of-service due to
TDM-BUS errors.
1. If system has no TDM-BUS errors and is not handling heavy traffic, repeat
test at 1-minute intervals up to 5 times.
1003
ABORT
The system could not allocate a tone receiver for the test. The system may be
oversized for the number of Tone Detectors present or some Tone Detectors
may be out-of-service.
1. Resolve any TTR-LEV errors.
2. Resolve any TONE-PT errors.
3. If neither condition exists, retry the reset board command at 1-minute
intervals up to 5 times.
1004
ABORT
Received an incoming call on a port of the UDS1 circuit pack during the test.
1. Enter the busyout board UUCSS command to put every trunk or port of
the UDS1 Interface circuit pack to out-of-service state.
2. Retry the reset board command at 1-minute intervals up to 5 times.
Continued on next page
Summary of Contents for S8700 Series
Page 50: ...Maintenance Architecture 555 233 143 1 26 Issue 1 May 2002 ...
Page 74: ...Initialization and Recovery 555 233 143 3 12 Issue 1 May 2002 ...
Page 186: ...Alarms Errors and Troubleshooting 555 233 143 4 112 Issue 1 May 2002 ...
Page 232: ...Additional Maintenance Procedures 555 233 143 5 46 Issue 1 May 2002 ...
Page 635: ...status psa Issue 1 May 2002 7 379 555 233 143 status psa See status tti on page 7 406 ...
Page 722: ...Maintenance Commands 555 233 143 7 466 Issue 1 May 2002 ...