
Chapter 5 Configuring VoIP trunks 63
IP Telephony Configuration Guide
Outgoing call configuration
This section explains how to set up your system to place calls through VoIP trunks. The system at
the other end of the call must be set up to receive VoIP calls. For information on this, refer to
“Incoming call configuration” on page 76.
Outgoing call configuration consists of the following steps:
• Putting VoIP lines into a line pool
• Configuring the access code for the line pool or assigning the line pool to a route number and
creating a destination code.
• Configuring telephones to access the VoIP lines
• Configuring a remote gateway
• Optional: Configuring PSTN fallback
Putting VoIP lines into a line pool
Lines 001 to 060 are reserved for VoIP trunks. However, they can be used only if you have entered
the appropriate keycodes to activate them.
When putting VoIP trunks into a line pool, choose a line pool that is not used for any other type of
line. Once you have created a line pool, you create an access code that the user dials on their
telephone to access the line pool.
Note: Set up an access code for the line pool only if you are NOT planning to use PSTN
fallback. If you intend to use PSTN fallback, you must assign the line pool you create in
this procedure to a route, and then you need to specify a destination code. Refer to
“Configuring PSTN fallback” on page 68.
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