Filter
Top Products
CO-TRK (Analog CO Trunk)
Issue 1 June 2005 841
513 57364 Ground detector stuck active. After several occurrences, an on-board minor
alarm is generated. Run the short test sequence. 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, or the loop is not open
after a disconnect. After several occurrences, an off-board or on-board
warning alarm is generated. Refer problem to CO.
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 will also fail. The last cause
could be that certain types of noise are present on the CO line during the
silent period of ringing. First check for other errors. If the count for this error
is very high (255), and every test passes, then either the reverse current
detector is defective or the CO line is noisy. If the CO line is suspect, make
Tip and Ring observations. If the line is determined to be noisy, refer the
problem to the CO. If the reverse current detector is defective, ignore this
error.
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 The loop is opening too slowly after a disconnect. This error indicates an
on-board problem, although the trunk may be functional. 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 every outgoing call should also fail. Check for other errors.
Table 287: CO Trunk Errors with No Tests (continued)
Error
Type
Aux
Data
Error Description and Repair Action
2 of 3