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Alarm 2992

Alarm 2992 – BTS AND TC UNSYNCHRONIZATION CLEAR CALLS ON A INTERFACE

Definition:

Calls have been cleared repeatedly on the same A interface circuit due to BTS and transcoder unsynchronisation and the number of successive releases has exceeded the limit defined in the PAFILE alarm parameter (alarm limit for successive remote tc failures).

Example:

**  ALARM  ……..               SC7_BX                              
    (7590) 2992 BTS AND TC UNSYNCHRONIZATION CLEAR CALLS ON A INTERFACE        
    1298d 3d 00F3 65535d 255d 34d 13d 4d 03 3d
END OF ALARMS CURRENTLY ON

Meaning:

  1. number of PCM circuit
    Indicates:
    - number of external PCM circuit if GSW and unsubmultiplexed A interface are in use
    - number of SMUX PCM circuit if GSW and submultiplexed A interface are in use
    - PCMCON record index if GSWB is in use
  2. time slot of the above-mentioned PCM circuit
  3. circuit identification code
  4. PCM circuit part of the circuit identification code
    In T1 (ANSI 1.544 Mbit/s) environment the value is 0xFFFF.
  5. time slot part of the circuit identification code
    In T1 (ANSI 1.544 Mbit/s) environment the value is 0xFF.
  6. number of external PCM circuit
  7. time slot of external PCM circuit
  8. sub-time-slot of external PCM circuit
  9. number of transcoder PCM circuit
    If GSW is used, this value is 0xFF.
  10. time slot of transcoder PCM circuit
    If GSW is used, this value is 0xFF.

Instruction:

Block the circuit in question with the MML command CEC.

< CEC:ETPCM=34,CRCT=3-3:    
LOADING PROGRAM VERSION 10.40-0
SPECIFIED STATES BEFORE MODIFICATION
ETPCM   CRCT   DIR   CGR  NCGR     STATE   COND
    34    3-3    IN     2  PHNM8AMR BL-US   –    
  SYS-ST:  00000000000000000000000000000000
  *****
    /* GIVE STATE OF EXTERNAL CIRCUIT(S)
    WO …. WORKING
    NU …. NOT IN USE
                                */
CEC:ETPCM=34,CRCT=3-3:WO;
EXTERNAL CIRCUIT(S) IN SPECIFIED STATES
ETPCM  CRCT   CGR  NCGR      OLDST  NEWST  CONN    COND
    34  3-3      2  PHNM8AMR  BL-US  WO-EX  IDLE     –    
  SYS-ST:  00000000000000000000000000000000
COMMAND EXECUTED
CIRCUIT STATE HANDLING COMMAND <CE_>

Check the transmission between (the BTS) the BSC and transcoder.

Check other active alarms concerning (the BTS) the BSC and transcoder transmission or transcoder plug-in units.

Correct the faults causing the alarms. When the above-mentioned transmission alarms have been cancelled or when transmission is working again, deblock the circuit in question with the MML command CEC.

This alarm only informs the user that calls are cleared due to unsatisfactory transmission or equipment failure but it does not directly indicate the faulty equipment, for example a plug-in unit.

Cancelling:

Do not cancel the alarm. The system cancels the alarm when the user blocks the circuit.
The system also cancels the alarm if a call is cleared in the circuit in question for some other reason than BTS and transcoder unsynchronisation.

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