Avaya S8700 Series, Maintenance Manual

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Maintenance-Object Repair Procedures
555-233-143 8-464 Issue 1 May 2002
FAIL Failure to detect ground or faulty ground detected on Ring lead. Display the
hardware errors for this trunk, to determine whether the fault was on- or
off-board. Look for Error Type 1025 or 1281 (if both appear in the Hardware
Error Log, pick the most recent error). Error Type 1025 indicates a faulty
ground detected on Ring lead (an off-board fault) and Error Type 1281
indicates failure to detect (internally generated) ground (an on-board fault).
Faulty ground detected on Ring lead (Error Type 1025):
NOTE:
On TN747B vintage 8 and greater circuit packs, an incoming seizure
during this test may cause it to fail with an off-board fault.
1. Repeat test. If test passes, ignore the original failure. If test aborts, follow
the recommended procedures.
2. Repeat test with CO line removed.
3. If test fails, replace the circuit pack.
4. If test passes, refer problem to CO.
Failure to detect ground (Error Type 1281):
1. Run the long test sequence. If the CO Demand Diagnostic test fails, the
Dial Tone test (#0) fails with Error Code 2002, AND Error Type 3329 or
3585 appears in the Hardware Error Log (with the same last occurred time
as Error Type 1281 and 1537), replace the circuit pack.
2. Repeat test with CO line removed.
3. If test fails, replace the circuit pack.
4. If test passes, the CO may be drawing too much current. Refer problem to
CO.
PASS This test verifies that the port is able to apply ground for outgoing calls and
detect ground for incoming calls; however, it does not provide information
about whether a CO line is actually connected. User-reported troubles on this
port should be investigated by using other port tests and by examining trunk or
external wiring.
Table 8-186. Test #3 CO Demand Diagnostic Test — Continued
Error
Code Test
Result
Description / Recommendation
Continued on next page