AudioCodes Mediant 500 E-SBC, User Manual

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User's Manual 776 Document #: LTRT-10437
Mediant 500 E-SBC
Parameter Description
incoming calls and does the following:
- Fully configured trunk (all channels):
> If all channels are idle when the graceful period begins, the
device immediately takes the channels out-of-service without
sending out-of-service Service messages and instead, only
takes the D-channel down.
> If at least one channel is busy during the graceful period, the
device immediately takes all idle channels out-of-service and
sends out-of-service Service messages to these B-channels.
Thus, the PSTN/PBX side can detect that these calls are in out-
of-service state and does not send new calls to these out-of-
service channels, eliminating the scenario of loss of calls due to
rejection.
> If a channel is released (call ends) during the graceful period
and there are still other busy channels, the device sends an
out-of-service Service message to the idle channel.
> When the last channel is released in the trunk (or Trunk
Group), the device takes all the channels out-of-service (locks
the Trunk Group) without sending an out-of-service Service
message; instead, it only takes the D-channel down.
When connectivity is restored for the Busy Out feature or the
Trunk Group is unlocked, the device brings the D-channel up
again without sending any Service messages to the B-
channels.
- Partially configured trunk (only some channels configured):
The device places all channels out-of-service only after the
graceful period expires, by sending out-of-service Service
messages to the B-channels (the D-channel remains up).
Notes:

When configuring out-of-service behavior per trunk
(DigitalOOSBehaviorForTrunk_x), you must stop the trunk (
Stop
Trunk button in the Trunk Settings page), configure the parameter,
and then restart the trunk ( Apply Trunk Settings button in the
Trunk Settings page) for the settings to take effect.

To define out-of-service behavior for all trunks (globally), see the
DigitalOOSBehavior parameter.

For locking/unlocking Trunk Groups in the Trunk Group Settings
table, see Configuring Trunk Group Settings on page 355.

For a description of the Busy Out feature and for enabling the
feature, see the EnableBusyOut parameter.

To configure the graceful out-of-service period, see the
GracefulBusyOutTimeout parameter.

If the ISDN variant does not support the configured out-of-service
option of the parameter, the device sets the parameter to Default
[0].

The x in the ini file parameter name denotes the trunk number,
where 0 is Trunk 1.
Web: Digital Out-Of-Service
Behavior
CLI: dig-oos-behavior
[DigitalOOSBehavior] Defines the method for setting all digital trunks to out-of-service state.
To configure the out-of-service method per trunk, see the
DigitalOOSBehaviorForTrunk_x parameter.

[0] Default = (Default) For a detailed description, see option [0] of
the DigitalOOSBehaviorForTrunk_x parameter (per trunk setting).

[1] Service = Sends an ISDN Service message indicating out-of-
service state (or in-service). For a detailed description, see option
[1] of the DigitalOOSBehaviorForTrunk_x parameter (per trunk