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DEFINITY ECS Release 8.2 Maintenance for R8.2csi
555-233-119 Issue 1
April 2000
Maintenance Objects
3-402CO-TRK (CO Trunk)
3
FAIL Failure to detect ground or faulty ground detected on Ring lead. Display
the hardware errors for this trunk, to determine if 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.
57481 FAIL On-board test of programmable transmission circuitry failed.
1. Replace the circuit pack.
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
on 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 3-174. TEST #3 CO Demand Diagnostic Test — Continued
Error
Code
Te s t
Result Description/ Recommendation
Continued on next page