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DEFINITY Enterprise Communications Server Release 5
Maintenance and Test for R5vs/si
555-230-123
Issue 1
April 1997
Maintenance Object Repair Procedures
Page 10-823ISDN-TRK (DS1 ISDN Trunk)
10
be transitioned to maintenance. The far-end has a certain amount
of time to respond to the message. The service state will be PMTC
until either a response is received or the timer expires.
— Call Activity States
In addition to the service and pending state, the state of a
B-channel also reflects its call activity. If a call is connected over
the B-channel, then the state of the trunk will reflect the "active" call
state, for example, "in-service/active." If there is no call on the
B-channel, then the trunk will reflect the "idle" call state, for
example, "OOS/FE-idle."
The following diagram of the DS1 ISDN Trunk service states shows the
common progression from one service state to another and the event that
caused the change of state.