PI-LINK (Processor Interface Link)
Issue 4 May 2002
10-1243555-233-123
TDM Loop Around Test (#183)
This test is destructive.
This test requires that you enter the busyout link lnk-no command before
running the test. This means that the DCS, AUDIX, or ISDN link, for example, are
torn down. This test checks the health of the TN754 or TN784 DIG-LINE or the
TN722 or TN767 DS1 Interface circuit pack. This depends on which circuit pack is
used on the link. The TN754 or TN784 Digital Line or DS1 Interface circuit pack is
put into loop around mode while the PI-BD is instructed to go into remote loop
around. If this test fails, and the previous Test #182 passes, then the TN754 or
TN784 Digital Line or the DS1 Interface circuit pack should be replaced. It is not
run on ports administered as EIA.
Table 10-462. TEST #183 TDM Loop Around Test
Error
Code
Tes t
Result Description/Recommendation
1 ABORT Link was not busied out via system technician.
1. Busyout the link via the busyout link lnk-no command.
2. Retry the test command.
2
4
8
ABORT Internal system error
1. Retry the command at 1-minute intervals a maximum of 5
times.
6 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. Refer to “TDM-BUS” to
diagnose TDM-BUS errors.
1. If system has no TDM-BUS errors and is not handling heavy
traffic, repeat test at 1-minute intervals a maximum of 5
times.
9 ABORT TN754 or TN784 Digital Line or TN722 or TN767 DS1 Interface
circuit pack is not installed.
1. Install circuit pack and retry the test.
Continued on next page
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