Alternative Routing To An Ip Destination Upon A Busy Trunk - AudioCodes Mediant 800B User Manual

23.6.2 Alternative Routing to an IP Destination upon a Busy Trunk

You can configure the device to forward (i.e., call redirection) IP-to-Tel calls to an
alternative IP destination using SIP 3xx responses. This can be done upon the following
scenarios:
 For digital interfaces: Trunk Group has no free channels (i.e., "busy").

For analog interfaces: Unavailable FXS / FXO Trunk Group. This feature can be used,
for example, to forward the call to another FXS / FXO device.
This feature is configured per Trunk Group and is configured in the Forward on Busy Trunk
Destination table, as described in this section.
The alternative destination can be defined as a host name or as a SIP Request-URI user
name and host part (i.e., user@host). For example, the below configuration forwards IP-to-
Tel calls to destination user "112" at host IP address 10.13.4.12, port 5060, using transport
protocol TCP, if Trunk Group ID 2 is unavailable:
ForwardOnBusyTrunkDest 1 = 2, 112@10.13.4.12:5060;transport=tcp;
When configured with user@host, the original destination number is replaced by the user
part.
The device forwards calls using this table only if no alternative IP-to-Tel routing rule has
been configured in the Inbound IP Routing table or alternative routing fails and one of the
following reasons included in the SIP Diversion header of 3xx messages exists:
 For digital interfaces: "out-of-service" - all trunks are unavailable/disconnected

"unavailable":

For digital interfaces: All trunks are busy or unavailable

For analog interfaces: All FXS / FXO lines pertaining to a Trunk Group are busy
or unavailable
Note:

To configure Forward on Busy Trunk Destination rules:
1. Open the Forward on Busy Trunk Destination page (Configuration tab > VoIP menu
> GW and IP to IP > Routing > Forward on Busy Trunk).
Figure ‎ 2 3-9: Forward on Busy Trunk Destination Page
The figure above displays a configuration that forwards IP-to-Tel calls destined for
Trunk Group ID 1 to destination IP address 10.13.5.67 if the conditions mentioned
earlier exist.
2. Configure the table as required, and then click Submit to apply your changes.
User's Manual
You can also configure the Forward on Busy Trunk Destination table using
the table ini file parameter, ForwardOnBusyTrunkDest.
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Mediant 800B GW & E-SBC
Document #: LTRT-10274