Maintenance-Object Repair Procedures
555-233-143
8-452 Issue 1 May 2002
CO-TRK (Analog CO Trunk)
If ATMS testing is enabled, check the error log for ATMS errors 3840 and 3841. If
the error log indicates that measurements exceeded acceptable thresholds, and
no other trouble is found with test trunk, run the ATMS test call with test
analog-testcall port UUCSSpp full.
NOTE:
Many trunk problems are caused by incorrect settings of parameters on the
trunk group administration form. Settings must be compatible with the local
environment and with parameter settings on the far end.
Analog CO trunks are 2-wire analog lines to the CO that support both incoming
and outgoing calls. CO trunk circuit packs have eight ports, each of which
provides an interface between the 2-wire CO line and the 4-wire TDM bus. The
system supports the following CO trunk circuit packs:
The following sequences show the interactions between the switch and the CO
during call setup for both loop-start and ground-start trunks.
MO’s Name (in
Alarm Log)
Alarm
Level Initial Command to Run
1
1. UU is the universal cabinet number (1–64 for ATM PNC, 1–44 for CSS PNC). C is the carrier
designation (A, B, C, D, or E). SS is the number of the slot where the circuit pack resides (01–21).
pp is the 2-digit port number (01, 02, 03 ...).
Full Name of MO
CO-TRK MAJOR
2
2. A MAJOR alarm on a trunk indicates that alarms on these trunks are not downgraded by the set
options command and that at least 75% of the trunks in this trunk group are alarmed.
test port UUCSSpp l Analog CO Trunk
CO-TRK MINOR test port UUCSSpp l Analog CO Trunk
CO-TRK WARNING test port UUCSSpp l Analog CO Trunk
TN438 TN2138
TN447 TN2147
TN465 TN2148
TN747
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