Topic Last Modified: 2012-09-21

The following example shows how an administrator can define a failover route for use if the Dallas-GW1 is down for maintenance or is otherwise unavailable. The following tables illustrate the required configuration change.

Table 1. User Policy

User policy Phone usage

Default Calling Policy

Local

GlobalPSTNHopoff

Redmond Local Policy

RedmondLocal

Dallas Calling Policy

DallasUsers

GlobalPSTNHopoff

Table 2. Routes

Route name Number pattern Phone usage Trunk Gateway

Redmond Local Route

^\+1(425|206|253)(\d{7})$

Local

RedmondLocal

Trunk1

Trunk2

Red-GW1

Red-GW2

Dallas Local Route

^\+1(972|214|469)(\d{7})$

Local

Trunk3

Dallas-GW1

Universal Route

^\+?(\d*)$

GlobalPSTNHopoff

Trunk1

Trunk2

Trunk3

Red-GW1

Red-GW2

Dallas-GW1

Dallas Users Route

^\+?(\d*)$

DallasUsers

Trunk3

Dallas-GW1

In Table 1, a phone usage of GlobalPSTNHopoff is added after the DallasUsers phone usage in the Dallas Calling Policy. This enables calls with the Dallas Calling policy to use routes that are configured for the GlobalPSTNHopoff phone usage if a route for the DallasUsers phone usage is unavailable.