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

24.6.2 Alternative Routing to an IP Destination upon a Busy Trunk

The Forward on Busy Trunk Destination table lets you configure alternative routing rules for
forwarding (i.e., call redirection) IP-to-Tel calls to an alternative IP destination using SIP
3xx responses. These rules are used upon the following:

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. 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 the
following reason(s) 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
The following procedure describes how to configure Forward on Busy Trunks in the Web
interface. You
ForwardOnBusyTrunkDest or CLI command, configure voip/gw routing fwd-on-bsy-trk-dst.

To configure a Forward on Busy Trunk Destination rule:
1. Open the Forward on Busy Trunk Destination page (Configuration tab > VoIP menu
> GW and IP to IP > Routing > Forward on Busy Trunk).
2. Click Add; the following dialog box appears:
Figure 24-8: 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.
3. Configure a rule according to the parameters described in the table below.
4. Click Submit, and then reset the device with a burn-to-flash for your settings to take
effect.
Table 24-8: Forward on Busy Trunk Destination Parameter Descriptions
Parameter
Trunk Group ID
CLI: trunk-group-id
User's Manual
can also configure
Defines the Trunk Group ID to which the IP call is destined to.
390
Mediant 800B Gateway and E-SBC
this using the table
- Add Record
Description
Document #: LTRT-10278
ini file parameter,