Interpreting Carrier States On The Dms-250 Switch - Nortel DMS-250 Reference Manual

10-10 Service verification
Table 10-2
PRI trunk (B-channel) states and actions
DMS-250 switch
states
PMB
DMB
RMB
LO
CFL
MB
SB

Interpreting carrier states on the DMS-250 switch

Table 10-3 lists DS-1 carrier states and actions.
297-2521-106 Standard 23.01 March 2001
Resource out of service
The PRI DTCI is out of
service.
The DCH is out of service.
The remote end of the
PRI trunk is out of service.
DCH cannot communicate
with layer 3.
The carrier is out of
service.
The PRI is manual busy.
The PRI circuit is system
busy.
Actions to be taken
- Enter PM level of the MAP terminal
- Post the DTCI
- Isolate the fault
- Enter PRADCH level of the MAP terminal
- Post the DCH
- Isolate the fault
- Enter TTP level of the MAP terminal
- Post the PRI trunk group
- Isolate the fault
- Enter PRADCH level of the MAP terminal
- Post the associated DCH
- Isolate the fault
- Enter carrier level of the MAP terminal
- Post the carrier
- Isolate the fault
- Enter TTP level of the MAP terminal
- Post the PRI trunk group
- Return the circuits to service
The system will return the member to service
after test is completed.
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