Nortel DMS-250 Reference Manual page 231

Table 10-3
DS-1 carrier states
DS-1 carrier state
INSV
Manual busy (MANB)
System busy (SYSB)
Unequipped (UNEQ)
Off-line (OFFL)
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
Resource out of service
switch states
OFFL Carrier is off-line
MANB Carrier is manual busy
SYSB Carrier is system busy
Explanation
The DS-1 is in service and can be used to service a trunk. No
alarms are present.
The DS-1 is out of service because of a command issued by
maintenance personnel.
The DS-1 is system busy because of a local or remote alarm.
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.
The DS-1 is off-line.
Digital Switching Systems DMS-250 ISDN Reference Manual MWC14 (CSP14)
—end—
Actions to be taken
From carrier level of the MAP terminal: busy and
return the carrier to service.
From carrier level of the MAP terminal: return the
carrier to service. Note the new carrier state.
From carrier level of the MAP terminal: diagnose
the fault. Note the new carrier state.
—end—
Service verification 10-11