User's Manual

issue is resolved. However, even if that is the case, it may be recommended to configure
a headquarters PSTN number that can be dialed to report the Avaya Aura
®
Session
Manager line issue. See Branch PSTN override on page 328 for more information.
• Provide PSTN trunk fallback within the branch configuration. See
Configuring PSTN trunk
fallback on page 331. Note however that PSTN fallback will also occur when the number
of external calls exceeds the available SIP trunk licenses.
Note:
If you want to have long distance routing on local trunks, be sure that the appropriate trunks
have been ordered from the local provider. Do not create a route for international phone
calls if you do not have that service.
Configuring PSTN trunk fallback
About this task
Use this procedure to provide PSTN trunk fallback with the branch configuration.
Procedure
1. Start Manager and connect to the B5800 Branch Gateway system.
2. In the left navigation pane, click ARS.
3. Click the New icon and select ARS.
4. Enter a Route Name, for example PSTN.
5. To add a short code click the Add... button.
A short code is required that will send the national calls to the branch's own PSTN.
Enter the normal defaults for such a short code as follows:
6. Make the changes as follows:
a) In the Code field, enter 1N;. For this example, 1N; will match any national
number dialing.
b) In the Feature field, leave the entry set as Dial3K1.
c) In the Telephone Number field, enter 1N. For this example 1N will match the
number dialed by the user after the dial 9 prefix.
d) In the Line Group Id drop-down box, select the line group used for the B5800
Branch Gateway system's external trunks. The default is 0.
PSTN trunk fallback
Implementing the Avaya B5800 Branch Gateway November 2011 331