AudioCodes Mediant 800 User Manual page 607

CHAPTER 23 Digital PSTN
Parameter
Mediant 800 Gateway & E-SBC | User's Manual
✔
Graceful out-of-service enabled: The device rejects
new incoming calls. If at least one busy channel
exists during the graceful period, the device
immediately takes all idle channels out-of-service and
sends out-of-service Service messages to the other
B-channels as soon as they become idle. When
graceful period ends, the device disconnects all non-
idle channels and then sends out-of-service Service
messages to them.
When connectivity is restored for the Busy Out feature or
the Trunk Group is unlocked, the device brings all the
trunks back into service by sending in-service Service
messages to all their B-channels.
■ [2] D-Channel = (Applicable only to ISDN and fully
configured trunks) Takes the D-channel down or brings it
up.
✔
Graceful out-of-service disabled: The device rejects
new incoming calls and immediately takes the D-
channel down.
✔
Graceful out-of-service enabled: The device rejects
new incoming calls. Only when all channels are idle
(when graceful period ends or when all channels
become idle before graceful period ends, whichever
occurs first), does the device take the D-channel
down.
When connectivity is restored for the Busy Out feature or
the Trunk Group is unlocked, the device brings the D-chan-
nels up again.
Note: For partially configured trunks (only some channels
configured), this option only rejects new calls for the trunk;
the D-channel remains up.
■ [3] Alarm = Sends or clears a PSTN Alarm Indication
Signal (AIS) alarm.
✔
Graceful out-of-service disabled: The device rejects
new incoming calls and immediately sends an AIS
alarm.
✔
Graceful out-of-service enabled: The device rejects
new incoming calls and only when all channels are idle
(when graceful period ends or when all channels
become idle before graceful period ends, whichever
occurs first), does the device send an alarm on the
trunk.
When connectivity is restored for the Busy Out feature or
the Trunk Group is unlocked, the device clears the alarm.
Note: For partially configured trunks (only some channels
configured), this option only rejects new calls for the trunk;
no alarm is sent.
■ [4] Block = (Applicable only to CAS) Blocks the B-
channels.
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Description