DS1-BD (DS1 Interface Circuit Pack)
Issue 4 May 2002
10-663555-233-123
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 loopback, transmit a test pattern, and verify that the pattern is
received unaltered through the loopback. 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 10-244. TEST #1209 DS1 Board Loopback Test
Error
Code
Tes t
Result Description/Recommendation
ABORT Internal system error
1. Retry test ds1-loop UUCSS ds1/csu-loopback-tests at
1-minute intervals a maximum of 5 times.
1005 ABORT DS1 Board Loopback Test cannot be executed in the current
configuration. To run this Test, the TN767E or later suffix 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.
1039 ABORT The DS1 Interface circuit pack is providing timing for the system.
Executing this test could cause major system disruption.
If the DS1 Interface circuit pack needs to be tested, set the
synchronization reference to another DS1 Interface circuit pack
or to the Tone-Clock circuit pack via the following command
sequence:
1. Issue disable synchronization-switch.
2. Issue set synchronization UUCSS.
3. Issue enable synchronization-switch.
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