DEFINITY ECS Release 8.2 Maintenance for R8.2csi
555-233-119 Issue 1
April 2000
Maintenance Objects
3-394CO-TRK (CO Trunk)
3
Table 3-172. CO Trunk Errors with NO Tests
Error
Type
Aux
Data Description and System Action System Technician 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 detected. This may
indicate that the ground detector is not
working. However, the ca ll is accepted .
See Note 1 at end of table.
257 50176 Battery reversal detected. This is usually
caused by the CO (often seen with
step-by-step and cross-bar offices in
connection with outgoing calls). This is
detected if the direction of the loop current
changes from normal to reverse for at least
40 msec. Could occur if the trunk was just
installed and for some reason the Tip and
Ring wires were reversed at the PBX. If
battery reversals occur during dialing,
wrong numbers may result. The CO should
be asked to remove the battery reversal
option.
Refer problem to CO.
513 57364 Ground detector stuck active. After several
occurrences, an on-board minor alarm is
generated.
Run short test. If test aborts with
Error Code 1000, disconnect Tip
and Ring and repeat short test. If
test still aborts, replace circuit
pack. If test passes, refer
problem to CO. If any other error
code is received, pursue that
problem.
769 57392 CO not releasing after call is dropped from
PBX end (off-board alarm after several
occurrences), or the loop is not open after a
disconnect (on-board alarm after several
occurrences).
For off-board alarm, refer
problem to CO. For on-board
alarm, the circuit pack has an
on-board problem (for example,
stuck relay) and should be
replaced.
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