CO-TRK error log entries and recommended actions

Last Updated : Aug 31, 2023 |
Table 1: CO-TRK error log entries

Error type

Aux data

Associated test

Alarm level

On or Off board

Command to resolve the error

0

0

Any

Any

Any

test port location

1

57347

15

any

Port Audit and Update (#36)

18

0

busyout trunk

WRN

OFF

release trunk grp#/mem#

130

WRN

ON

test port location r 2

257

50176

513

57364

MAJ MIN WRN 1

ON

769

57392

MAJ MIN WRN1

OFF

1025

Any

CO Port Diagnostic Test (#3)

MAJ MIN WRN1

OFF

test port location r 2

1281

Any

CO Port Diagnostic Test (#3)

MAJ MIN WRN1

ON

test port location r 3

1537

Dial Tone Test (#0)

MAJ MIN WRN1

OFF

test port location l r 2

1793

Looparound and Conference Test (#33)

MAJ MIN WRN1

ON

test port location l r 3

2049

NPE Crosstalk Test (#6)

MAJ MIN WRN1

ON

test port location l r 3

2561

57345

2817

57360

2817

57393

2817

57484

Dial Tone Test (#0)

MAJ MIN WRN

OFF

test port location long

3073

57376

3329

57408

3329

57484

Dial Tone Test (#0)

MAJ MIN WRN

OFF

test port location long

3585

57424

3840

8000

ATM Transmission Test (#844-848)

OFF

test analog-testcall full

3841

ATM Transmission Test (#844-848)

MIN

OFF

test analog-testcall full

1. Major alarms may be downgraded to Warning alarms based on the value used in set options.

Note:

  1. Error type 0: Run the short test sequence first. If every test passes, run the long test sequence. Refer to each appropriate test’s description, and follow its recommended procedures.

  2. These are in line errors that have no specific test associated with them. Numerous Error Types have these errors. Refer to the table for an explanation and appropriate action.

  3. Error type 15: software audit error that does not indicate any hardware malfunction. Run short test sequence, and investigate associated errors.

  4. Error type 130: the media module has been removed or has been insane for at least 11 minutes. To clear the error, reinsert or replace the circuit pack.

  5. Numerous Error types have these errors.

    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.

  6. Error types 1025/128: 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.

  7. Error type 3840: test calls made by the Automatic Transmission Measurement System (ATMS) returned measurements in the unacceptable range.

    Error type 3841: measurements were in the marginal range. Enter 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 the trunk group screen should be changed.

    Table 2: CO trunk errors with no tests

    Error type

    Aux data

    Error description and repair 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 call will be accepted. Busyout the affected port, and run a long test. Observe the test results. If any tests fail, refer to the description of the tests and the associated error codes. Release the port. If users continue to report troubles, check for other errors and make test calls to determine whether the problem should be referred to the CO.

    257

    50176

    Battery reversal detected. This is usually caused by the CO. 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. Refer problem to CO. Ask them to remove the battery reversal option.

    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.

    3329

    57408

    Trunk error. No Tip ground detected on outgoing call. This error occurs when an attempt is made to seize a ground-start CO trunk for an outgoing call and Tip ground is not detected or the caller hangs up before Tip ground is detected.

    1. Busyout the affected port, and run a long test. Observe the test results. If any tests fail, refer to the description of the tests and the associated error codes. Release the port.

    2. If users continue to report troubles, check for other errors and make test calls to determine whether the problem should be referred to the CO. Busyout the affected port, and run a long test. If Dial Tone Test #0 passes, ignore this error. Release the port.

    3585

    57424

    No loop current on outgoing call. This error occurs on attempt to seize a loop or ground-start trunk for an outgoing call. An error occurs if loop current is not detected or the caller hangs up before it is detected. Busyout the affected port, and run a long test. If the CO Port Diagnostic Test #3 passes and this error keeps occurring, refer problems to CO. Release the port.