DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126 Issue 4
June 1999
Maintenance Object Repair Procedures
9-431CO-TRK (Analog CO Trunk)
9
Aux data 57424 — No loop c urrent on outgoing call
Aux data 57484 — No dial tone on outg oing call
These errors will cause the Dial Tone Test (#0) to run and are only
considered a p roblem if the Dial Tone Test fails (in which case Error Type
1537 will also show up). In this case, the trunk may be put in
"Ready-for-Service" state (shown as "disconnected" by status command ),
which allows only incoming c alls. Run the Dial Tone T est (#0) and follow its
outlined proced ures.
If error count associated with this error typ e is very high (i.e., 255) and if
Alarm Status on the Hardware Error Report is "n" (not alarmed), then the
existence of this error type indic ates that, despite the fac t that many in-line
error messages have been receiv ed, all Call Seizure Tests have passed.
Problems at the CO may cause this cond ition rather than problems with
the PBX.
e. These errors will be logged for all versions of the CO-TRK/CO-BD.
However, no MINOR alarms will be generated for Cen tral Office Trunks
[TN747B] with vintages V8 or greater. Any failures received by this te st will
still be logged as Error type 1025/1281.
Check for the use of MFT/Range extenders. If there are extenders present,
and there are no other complaints or m aintenance errors against this
trunk, then there is a good chan ce that Test #3 failed due to excessive
loop current and may be ignored.
f. Error 3840 indicates that test calls mad e by the Automatic Transmission
Measurement System (ATMS) returned measurements in the
unacceptab le range. Error 3841 indicates measurements were in the
marginal range. Use list testcall detail to examine the specific
transmission parameters which are out of sp ec, and investig ate the trunk
for that kind of noise. If the noise is accep table, then the AMTS thresholds
administered on pag e 4 of the trunk group form should be changed .
Table 9-180. CO Trunk Errors with No Tests
Error
Type Aux
Data Error Description and Repair Action
1 57347 Port error. Ringing without ground. This error is detected on an incoming
call on a ground-start CO trunk. The CO trunk circuit pack has not detected
a Tip ground before ringing current is detec ted. This may indicate that the
ground detector is not working. However, the call will be ac cepted. Busyout
the affected port, and run a long test. Observe the test results. If any tests
fail, refer to the description of the tests and the associated error codes.
Release the port. If users continue to report troubles, check for other errors
and make test calls to determine whether the problem should be referred to
the CO.
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