Avaya 03-300430 Home Security System User Manual


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DS1-FAC (DS1 Facility)
Issue 1 June 2005 1071
2500 ABRT Internal system error
1. Retry the command at 1-minute intervals up to 3 times.
FAIL Far-End Internal loop back failed. A problem exists between DS1 converter
A and DS1 converter B’s internal interface for the DS1 facility (see previous
diagram).
1. If the test is executed as a part of an error analysis, then return back to
the related section.
2. Enter display errors and follow the associated repair procedures
for any on-board DS1C-BD errors on this DS1 converter circuit pack
and the DS1 converter circuit pack at the other end of the DS1
converter complex.
3. If the network is used instead of private T1 lines, verify that the DS1
facility and the network are using the same Line Coding. For TN574
boards and TN1654 boards in T1 mode, also verify that the Framing
Mode used is the same. Use list fiber-link and display
fiber-link to check the values for this DS1 facility. Contact T1
Network Service to check the modes used by the network. See the
previous sections, “Line Coding” and “Framing Mode” for details on
how these options apply to the TN574 and TN1654 DS1 converter
boards.
4. Isolate the problem by running the Near-End External Loopback test
(#799) via test ds1-facility location external-loopback,
first at this end and then at the other end of the DS1 converter complex.
Setup loop backs at different points as shown in the description
diagram for Test #799, and follow repair procedures described for Test
#799.
5. If the problem could not be found by near-end external loop-back tests,
then the fault should be between the CSU A and the CSU B. Contact
T1 Network Service to resolve the problem, also see the repair
procedures for Error Type #1025 (loss of frame alignment).
Any PASS Transmission through the path of the loop back is successful. TN1654 DS1
facilities will display the round trip delay time in milliseconds in the Error
Code field. The round trip delay time is defined as the length of time in
milliseconds it takes for the firmware to receive the test pattern after it has
been sent.
Table 365: Test #797 Far-End Internal Loop-Back Test (continued)
Error
Code
Test
Result
Description / Recommendation
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