AudioCodes Mediant 800B User Manual page 1063

User's Manual
Parameter
Version 7.2
or in-service state for ISDN variants that support Service
messages. For ISDN variants that do not support Service
messages, the device sends an Alarm Indication Signal (AIS)
alarm.

CAS: Sends an Alarm Indication Signal (AIS) alarm.

[1] Service = (Applicable only to T1 ISDN variants that support this
method) Sends ISDN Service messages indicating out-of-service or
in-service state.

Graceful out-of-service disabled: The device rejects new
incoming calls and immediately takes all channels (idle and
busy) out-of-service, by sending Service messages on the B-
channels. The device disconnects busy channels before it
sends out-of-service Service messages on them.

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-channels 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.
1063
67. Configuration Parameters Reference
Description
Mediant 800B Gateway & E-SBC