Routing to a specific PSTN trunk group

Each route in the routing table that terminates to the PSTN can be assigned a trunk group number to be used for the outgoing PSTN call. The gateway then chooses an available circuit (based on the configured circuit selection algorithm) in the specified trunk group to use for the resulting call.

If no circuits are available in the specified trunk group, then the outgoing call fails. Failover routes can be configured with no trunk group specifier or with an alternate trunk group specifier. If a route terminating to the PSTN does not have a trunk group specifier, any outgoing or two-way trunk can be used.

To route calls to a specific trunk group, follow these steps:

Step

Action

1

Access the Vision Console, as described in Accessing the Vision Console.

2

Click Trunks in the Configuration menu. The Trunks page is displayed.

3

In the Trunks page, create a new PSTN route and assign trunks to this route.

For information, see Trunks.

4

Click Gateway profiles in the Provisioning menu. The Routing profiles configuration page with the default profile is displayed.

5

Modify the default profile to create outbound calls on the newly created PSTN route by updating the PSTN Route parameter in the PSTN section of the profile page. Click Submit.

For information, see PSTN routing profile parameters.

6

If you created a new profile for this route rather than modifying the default profile, associate this new profile with the newly created PSTN route. To do so, click Gateway routes in the Provisioning menu and update the profile association for this route.

The following example shows how to route all SIP calls to route 2:

ID Profile Incoming Called party Incoming Calling party Outgoing Called party Outgoing Calling party

1

Default

sip:(.*)@(.*)

sip:(.*)@(.*)

tel:$1

tel:$1

For more information about routing table expressions, see Routing table expressions.