This topic describes the procedure for checking trunk circuit status, expected check results, and troubleshooting methods.
Reference Standard
In the DSP PRATKC command output, the value of Display result is B_IDLE or B_BUSY. If the value of Device number is a multiple of 16, the system does not check the trunk circuit status.
Procedure
- Run the LST OFC command to query the value of the Office direction number.
- Run the DSP OFTK command to query circuit status in an office.
Ensure that the sum of the values of Free percent and Busy percent is 100%, and the number of circuits in the Free state is equal to or greater than 20% of total circuits. Otherwise, the fault needs to be located. In the case of no service, all circuits must be in the Free state.
- Run the DSP OFTS command and set State to idle to query the status distribution of a specified circuit.
NOTE: The MN parameter indicates a call control unit (CCU) module number. You do not need to set the parameter, which indicates that all CCU modules are queried.The number of circuits that are normal excluding in the idle and busy states in the office must be 0.
- Run the LST TKC command to obtain a CCU module number. Run the DSP TKC command to check the status of all configured trunk circuits.
Except E1 line timeslots 0 that are occupied by links or occupied by circuits whose numbers are multiples of 32 for synchronization, the status of circuits must be in the Free or Busy state, which indicates that the circuits are normal. In the case of no service, all circuits must be in the idle state.
- Run the DSP N7C command and set Device type to ISUP to query Signaling System No.7 (SS7) trunk circuits.
Except E1 line timeslots 0 that are occupied by links or occupied by circuits whose numbers are multiples of 32 for synchronization, the Local circuit status of circuits must be in the Idle or Busy state, which indicates that the circuits are normal.
