Maintenance-Object Repair Procedures
555-233-143
8-630
Issue 1 May 2002
DS1 Board Loop-Back Test (#1209)
This test is destructive.
The DS1 BLB (Board Loopback) test causes a loop back at the TN767E DS1
board edge and tests DS1 board internal circuitry.
The test is destructive and can only be initiated by a technician-demanded
test ds1-loop UUCSS ds1/csu-loopback-tests command.
All trunks or ports on the DS1 Interface circuit pack must be busied out via the
system technician busyout board command before running the BLB test.
When the BLB test is initiated, maintenance software sends an appropriate
message to the TN767E DS1 Interface circuit pack to start the test. The board will
set up the BLB loop back, transmit a test pattern, and verify that the pattern is
received unaltered through the loop back. If the transmitted and received pattern
is different, the test fails.
When the test is complete, all trunks or ports on the TN767E DS1 Interface circuit
pack are restored to the in-service state after the release board command is
entered
Table 8-254.
Test #1209 DS1 Board Loop-Back Test
Error
Code
Test
Result
Description / Recommendation
ABORT
Internal system error
1. Retry test ds1-loop UUCSS ds1/csu-loopback-tests at 1-minute
intervals up to 5 times.
1005
ABORT
DS1 Board Loopback test cannot be executed in the current configuration. To
run this test, the TN767E (or higher-suffixed) DS1 must be administered for
24-channel operation. The
Bit Rate
field on the DS1 circuit pack
administration form must be set to “1.544” for 24-channel operation.
1015
ABORT
Ports on the DS1 Interface circuit pack have not been busied out to
out-of-service.
1. Enter busyout board UUCSS to put all trunks or ports of the DS1 Interface
circuit pack into the out-of-service state.
2. Retry the command.
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 ...