Nortel DMS-250 - Restoring Service to the Carrier

Service verification 10-11
Digital Switching Systems DMS-250 ISDN Reference Manual MWC14 (CSP14)
Table 10-3
DS-1 carrier states
DS-1 carrier state Explanation
INSV The DS-1 is in service and can be used to service a trunk. No
alarms are present.
Manual busy (MANB) The DS-1 is out of service because of a command issued by
maintenance personnel.
System busy (SYSB) The DS-1 is system busy because of a local or remote alarm.
Unequipped (UNEQ) A P-side port for the PRI DTCI is unequipped when no datafill
exists in table LTCPSINV to define that port. Any trunks that may
be datafilled for that facility will be off-line.
Off-line (OFFL) The DS-1 is off-line.
—end—
Restoring service to the carrier
Table 10-4 lists DS-1 carrier states and actions.
Table 10-4
DS-1 carrier states and actions
DMS-250
switch states
Resource out of service Actions to be taken
OFFL Carrier is off-line From carrier level of the MAP terminal: busy and
return the carrier to service.
MANB Carrier is manual busy From carrier level of the MAP terminal: return the
carrier to service. Note the new carrier state.
SYSB Carrier is system busy From carrier level of the MAP terminal: diagnose
the fault. Note the new carrier state.
—end—