LevelOne WBR-3470 - Manual (Page 96)

4.3.8.3 IAX Settings
IAX2 (Inter Asterisk exchange protocol ver.2) is a proprietary protocol of Asterisk by Digium.
It is a simple protocol like SIP. Yet, it can pass through any kind of NAT. It is much more
popular since it is provided as an open source. For more information, please visit
http://www.asterisk.org
Port: IAD supports IAX2 protocol. Normally IAX2 uses Port 4569.
Server: The Asterisk server’s IP address
Server Port: The port number for the Asterisk server. Default is 4569
Refresh Interval: The time interval in which the phone periodically refresh IAX sessions
by sending repeated INVITE or Update request.
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