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DEFINITY Enterprise Communications Server Release 6
Maintenance for R6vs/si
555-230-127
Issue 1
August 1997
Maintenance Object Repair Procedures
Page 10-311CO-TRK (CO Trunk)
10
FAIL Trunk was seized, but dial tone could not be detected.
1. Test all administered outgoing ports on the board. Failure of 1
indicates a problem toward the CO.
2. If all fail, see note below.
3. Check for errors on the TONE-BD or TONE-PT. Clear any errors found,
and repeat the test.
4. If the error has still not cleared, refer the problem to the CO.
5. If no service problems exist on the port, continue to use the port until
the circuit pack can be replaced (as a last resort). Perform a trunk test
call to see if the trunk is operable.
NOTE:
If the dial tone test fails for all ports on a circuit pack, a -5 volt power
problem is indicated. If a TN736 or TN752 power unit circuit pack is
present, either the 631DB AC power unit or the 676B DC power unit
may be defective. (The 631DB power unit is used in a medium
cabinet powered by an AC source. The 645B power unit is used in a
medium cabinet powered by a DC power source.) The system may
contain a TN736 or TN752 power unit circuit pack or a 631DB AC
power unit, but not both types of power units. To investigate
problems with a 631DB AC power unit, refer to the CARR-POW
(carrier port power unit for AC-powered systems) Maintenance
documentation. To investigate problems with a 645B DC power unit,
refer to the CARR-POW (carrier port power unit for DC-powered
systems) Maintenance documentation.
2002 FAIL Seizure portion of test failed due to hardware problem. Fault is usually
caused by a disconnected trunk.
1. If the CO Demand Diagnostic Test (#3) also failed, display the
Hardware Error Log. If the CO Demand Diagnostic Test failed
because it could not detect ground (indicated by Error Type 1281 in
the Hardware Error Log) 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. Check trunk wiring to ensure good connection; repeat test if wiring
correction made.
3. Locate another identical CO trunk and swap its wiring with one under
test. Repeat test on both trunks and determine if problem follows trunk
or remains at original port. If problem follows trunk, refer problem to
CO. If problem remains at port, replace circuit pack and repeat test.
4. If replacing circuit pack does not clear failure, escalate the problem.
Table 10-101. TEST #0 Dial Tone Test — Continued
Error
Code
Test
Result Description/ Recommendation
Continued on next page