Maintenance-Object Repair Procedures
555-233-143
8-456 Issue 1 May 2002
d. Aux data 57345 — Single polarity ringing current
Aux data 57376 — No loop current on incoming call
Aux data 57408 — No tip ground detected on outgoing call
Aux data 57424 — No loop current on outgoing call
Aux data 57484 — No dial tone on outgoing call
These errors will cause Dial Tone Test #0 to run and are only considered a
problem 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), that allows only incoming
calls. Run Dial Tone Test #0, and follow its outlined procedures.
If error count associated with this error type 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 indicates that, despite the fact that many in-line
error messages have been received, every Call Seizure test has passed.
Problems at the CO may cause this condition rather than problems with the
PBX.
e. These errors will be logged for every version of the CO-TRK/CO-BD.
However, no MINOR alarms will be generated for Central Office Trunks
[TN747B] with vintages V8 or greater. Any failures received by this test 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 maintenance errors against this trunk,
then there is a good chance that Test #3 failed due to excessive loop
current and may be ignored.
f. Error 3840 indicates that test calls made by the Automatic Transmission
Measurement System (ATMS) returned measurements in the
unacceptable range. Error 3841 indicates measurements were in the
marginal range. Use list testcall detail to examine the specific
transmission parameters that are out of spec, and investigate the trunk for
that kind of noise. If the noise is acceptable, then the AMTS thresholds
administered on page 4 of the trunk group form should be changed.
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