
392 Chapter 46 Setting up VoIP trunks for fallback
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• Ensure the PSTN and VoIP line pools have been configured before you continue with this
section. For information about creating a VoIP line pool, see “Configuring VoIP trunk
gateways” on page 381. To configure PSTN lines, select Configuration > Telephony > Lines
> Active Physical Lines.
Adding routes for fallback
Enter the routes you want to use for normal and fallback traffic.
To add routes, select Configuration > Telephony > Dialing Plan > Routing.
To add the PSTN route to other system
1 Type a number between 001 and 999.
This route defines the PSTN route to the other system. Only numbers not otherwise assigned
will be allowed by the system.
2 Click OK.
To add the PSTN route to the local PSTN lines
1 In the Route field, type a number between 001 and 999.
This route defines the PSTN route to your local PSTN.
2 Click Save.
To add the VoIP route
1 In the Route field, type a number between 001 and 999.
This route defines the VoIP route.
2 Click Save.
Assigning the line pools to routes
Assign the line pools to the routes you created in the previous section.
To assign PSTN line pool (to other system)
1 Click the route you created between the PSTN line and the other system.
2 In the Use Pool box, type the letter of the line pool for the PSTN lines to the other system.
3 In the External Number field:
If this is a public PSTN line, enter the dial numbers that access the other system through the
PSTN. For example: 1<area code><local code>.
Note: If you already have routes for your PSTN or VoIP line pools configured,
you do not need to configure new routes, unless you cannot match the dialed
digits.
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