The IAX telephone can be an IP phone or a softphone running on a PC. It can be registered in the Abilis private or public side.

Enter into the Abilis control-program or open the configuration file with the Console configurator and type the following commands.
| a
            res:ctiiax or s act res:ctiiax | Add the CTIIAX resource. or If the resource already exists, set it active. | 
| s p ctiiax act:yes | Enable the CTIIAX runtime functionalities. | 
| a user:iax_phone pwd:iax_phone iax:yes | Add the username and password associated to the IAX telephone and enable it to IAX protocol. | 
| s user:iax_phone iax-number:61 | Configure the IAX telephone number. | 
| s user:iax_phone iax-maxses-bid:4 | Configure the maximum number of IAX bidirectional sessions. | 
| save conf | Save the configuration. | 
On a working Abilis, a system restart is required to make the CTIIAX resource running.
| ![[Note]](../images/note.png) | Note | 
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| The previous configuration can be applied also when Asterisk must register itself onto Abilis. | 
| ![[Tip]](../images/tip.png) | Tip | 
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| For the softphones configuration, refer to Chapter 89, Softphones. |