Digium, Inc.
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Chapter 3: Telephone System Configuration
Adding VoIP Trunks
If you do not have a subscription with one of the VoIP providers listed
above, or you have a special VoIP setup, you can add a custom VoIP
trunk. Click the VoIP Trunks tab to add a VoIP (SIP or IAX) service
provider. The Create New SIP/IAX Trunk page will be displayed.
Figure 13: Create New SIP/IAX Trunk Definition
Fill in the initial SIP/IAX trunk definition with the following information:
Type - Select either the SIP or IAX protocol.
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SIP - Identifies that the trunk sends and receives calls using the
VoIP protocol SIP.