See Also
Setting up basic routing for emergency telephone numbers (such as 999 or 911 used in this example) requires that calls to the emergency number be routed to the gateway local to the location of the user. This can be accomplished using the following configuration.
Table 1. User Policy
| User policy | Phone usage |
|---|---|
|
Default Calling Policy |
Local GlobalPSTNHopoff |
|
Redmond Calling Policy |
Redmond911 Local GlobalPSTNHopoff |
|
Redmond Local Policy |
Redmond911 RedmondLocal |
|
Dallas Calling Policy |
Dallas911 DallasUsers GlobalPSTNHopoff |
Table 2. Routes
| Route name | Number pattern | Phone usage | Gateway |
|---|---|---|---|
|
Redmond Local Route |
^\+1(425|206|253)(\d{7})$ |
Local RedmondLocal |
Red-GW1 Red-GW2 |
|
Dallas Local Route |
^\+1(972|214|469)(\d{7})$ |
Local |
Dallas-GW1 |
|
Universal Route |
^\+?(\d*)$ |
GlobalPSTNHopoff |
Red-GW1 Red-GW2 Dallas-GW1 |
|
Dallas Users Route |
^\+?(\d*)$ |
DallasUsers |
Dallas-GW1 |
|
Redmond 911 route |
^911$ |
Redmond911 |
Red-GW1 |
|
Dallas 911 route |
^911$ |
Dallas911 |
Dallas-GW1 |
- A new policy called Redmond Calling Policy is created and a
phone usage of Redmond911 is added to it. Similarly, a phone usage
of Dallas911 is added to the Dallas Calling Policy.
- Emergency telephone calls made from users with a phone usage of
Redmond911 are routed via Red-GW1 using the Redmond 911 route, and
users with a phone usage of Dallas911 are routed via Dallas-GW1
using the Dallas 911 route.
The previous configuration illustrates the flexibility where the same number is routed via different gateways based on the user who is calling.