User Guide

DEFINITY Enterprise Communications Server Release 5
Maintenance and Test for R5vs/si
555-230-123
Issue 1
April 1997
Maintenance Object Repair Procedures
Page 10-334CO-TRK (CO Trunk)
10
2561 57345 Single polarity ringing current. This error
results from abnormal ringing current,
but does not prevent the incoming call
from being accepted. One cause could
be that the reverse current detector
associated with the port is failing. (Will
not be detected by any tests.) Another
cause could be that normal current is
not detected. In this case, neither
incoming nor outgoing calls can be
completed, and the dial tone test also
fails. The last cause could be that
certain types of noise are present on the
CO line during the silent period of
ringing.
Check for other errors first
and then see Note 4 at end of
table.
2817 57360 Ground but no ringing. This error occurs
on an incoming call on a ground-start
trunk. If ringing is not detected within 5
seconds of the Tip being grounded, the
call is still accepted. If the CO is of the
No. 5ESS. switch type, ringing delays of
more than 5 seconds during heavy
traffic are fairly common.
Check for other errors.
2817 57393 On the TN465, the loop is opening too
slowly after a disconnect. This error
indicates an on-board problem,
although the trunk may be functional.
On the TN2138, CO released the trunk
at least 4 minutes after the PBX
dropped the call. This error code is
log-only and causes no other testing to
occur. No alarm is generated.
Check for other errors.
3073 57376 No loop current on incoming call. The
incoming destination has already
answered and no loop current has been
detected. If this is a hard fault, the dial
tone test and all outgoing calls should
also fail.
Check for other errors.
Table 10-93. CO Trunk Errors with NO Tests — Continued
Error
Type
Aux
Data Description and System Action System Technician Action
Continued on next page