AudioCodes E-SBC

CHAPTER23 Digital PSTN
Mediant 1000 Gateway & E-SBC | User's Manual
Parameter Description
✔ Graceful out-of-service disabled: The device rejects
new incoming calls and immediately blocks all
channels (idle and busy). The device disconnects
busy channels before blocking 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 blocks all idle channels, and blocks the
other B-channels as soon as they become idle. When
graceful period ends, the device disconnects all non-
idle channels and then blocks them.
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, disconnects busy
channels, and takes the D-channel down.
- Partially configured trunk (only some channels
configured): The device rejects new incoming calls,
disconnects busy channels, and sends out-of-service
Service messages to all the configured channels (D-
channel remains up).
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