Avaya S8700 Maintenance Manual page 1393

DS1-FAC (DS1 Facility)
3. If the test passes, run the Near-End External Loopback test (#799)
4. If Test #799 passes, run the Far-End Internal Loopback test (#797)
5. If the problem could not be isolated by the near-end external
6. If the problem still persists, check for excessive slips and
7. Enter display errors and follow the associated repair procedures
8. If the problem still persists, replace this DS1 CONV circuit pack.
9. If the problem still persists, replace the DS1 CONV circuit pack at
If D4 framing mode is used, an in-band alarm signal (RFA) will be
transmitted that will corrupt the transmit data on this facility.
g. Aux Data None This entry in the DS1 Facility Error Log will only occur prior
to Release V5. The DS1 CONV circuit pack's neighbor (the DS1 CONV
circuit pack at the other end of the DS1 CONV complex) is unable to frame
up on the signal being sent to it by this DS1 CONV circuit pack on this DS1
facility. The far-end facility will be in LFA state. To isolate faults for this
case, follow the repair procedure for Error Type #1025 for the other end of
the DS1 facility. Note that references to the near and far ends are
reversed, for example, the neighbor is now the near end. If D4 framing is
used, received data will be corrupted as well as transmitted data.
555-233-143
via the test ds1-facility UUCSSf external-loopback command by
setting up a loop back at DS1 facility side of CSU towards the DS1
CONV circuit pack shown as loop-back point LB 2 in the test
description diagram. If the test fails, replace the CSU.
via the test ds1-facility UUCSSf long command. If Test #797
passes, go to step 6. If the test fails, then run the Near-End External
Loopback test (#799) via the test ds1-facility UUCSSf
external-loopback command at the other end of the DS1 CONV
complex, and repeat steps 2 and 3 for the other endpoint.
If this is not a critical-reliability system and if there is only one DS1
facility, then Test #799 can only be executed at the end that is closer
to the media server relative to the DS1 CONV circuit pack at the end
of the DS1 CONV complex. If the test cannot be executed for this
reason, then replace the cables, connectors and the CSU at the
other end of the DS1 CONV complex.
loop-back tests, then the fault should be between CSU A and CSU
B. Contact T1 Network Service to resolve the problem(*).
synchronization problems. Enter display errors and follow the
associated repair procedures for any SYNC, TDM-CLK, or SNC-BD
errors. For TN574 boards and TN1654 boards in T1 mode, check
line equalization settings as described in the above section,
CONV-1 and DS1 CONV-2 Line
for any EXP-INTF, and SNI-BD errors for the Fiber Endpoints. Enter
display errors and follow the associated repair procedures for any
FIBER-LK errors for this fiber link.
the other end of the DS1 CONV complex.
Compensation''.
Issue 1 May 2002
''DS1
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