Setting up your IAX Trunk inside PBX in a Flash

• Setting up a IAX Trunk is very similar to a SIP Trunk, the biggest difference in registration is the Register String. The IAX trunk contains more information than a SIP Trunk. Trunk information can be copied over just like setting up the SIP Trunks
• Make sure to set the registration string as; username:password@domain
• If you would like to see if trunks are registered you can go to the FreePBX System Status and look at IP Trunk Registrations.
• In the SIP Trunk make sure the contact field behind the registration string. The setup for the registration string will be username:password@domain/sipContact(username)
• After you have created your IAX Trunk you need to modify the Asterisk IAX Settings inside the Tools.
• Inside here you will be able to make changes to the Codec's, bandwidth control, and multiple other settings.
• These items will need to be checked if you have any special type of NAT setup inside the firewall or company.
• Be sure to open up Port 4569 inside your firewall, as well as ports 10,000-20,000 which are mainly for SIP, but IAX uses some of those ports