Alternative Routing To An Ip Destination Upon A Busy Trunk - AudioCodes Mediant 1000B User Manual

User's Manual

24.5.2 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. The alternative routing is triggered upon the following:

Digital interfaces: Trunk Group has no free channels (i.e., "busy").

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 IP-to-Tel Routing table or alternative routing fails and the following
reason(s) in the SIP Diversion header of 3xx messages exists:

Digital interfaces: "out-of-service" - all trunks are unavailable/disconnected

"unavailable":
•
Digital interfaces: All trunks are busy or unavailable
•
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 through the
Web interface. You can also configure it through ini file (ForwardOnBusyTrunkDest) or CLI
(configure voip > gateway routing fwd-on-bsy-trk-dst).

To configure a Forward on Busy Trunk Destination rule:
1. Open the Forward on Busy Trunk Destination table (Setup menu > Signaling &
Media tab > Gateway folder > Routing > Forward on Busy Trunk Destination).
2. Click New; the following dialog box appears:
Figure 24-14: Forward on Busy Trunk Destination Table - Add Dialog Box
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 conditions mentioned earlier
exist.
3. Configure a rule according to the parameters described in the table below.
4. Click Apply, and then reset the device with a save-to-flash for your settings to take
effect.
Version 7.2 537 Mediant 1000B Gateway & E-SBC
24. Routing