AudioCodes Mediant 3000 User Manual page 917

User's Manual
Parameter
Version 7.0
service Service messages to the B-channels.
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 enabled: 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.

Graceful out-of-service disabled: The device rejects new
incoming calls and immediately blocks all channels (idle and
busy).

Graceful out-of-service enabled: The device rejects new incoming
calls and blocks all channels (idle and busy) only when the
graceful period expires.
When connectivity is restored for the Busy Out feature or the Trunk
Group is unlocked, the device unblocks all the B-channels.

[5] Service and D-Channel = (Applicable only to T1 ISDN variants
that support this method) Sends ISDN Service messages to indicate
out-of-service or in-service state and takes the D-channel down or
brings it up.

Graceful out-of-service disabled:
- Fully configured trunk (all channels): The device rejects new
incoming calls and only takes the D-channel down.
- Partially configured trunk (only some channels configured): The
device rejects new incoming calls and sends out-of-service
Service messages to all the configured channels (D-channel
remains up).
917
58. Configuration Parameters Reference
Description
Mediant 3000