Cost / License
- Free
- Open Source
Platforms
- Windows
- Linux
- FreeBSD
IAXmodem is described as 'Software modem written in C that uses an IAX channel (commonly provided by an Asterisk PBX system) instead of a traditional phone line and uses a DSP library instead of DSP hardware chipsets' and is an app in the social & communications category. There are 2 alternatives to IAXmodem for Windows, Linux and FreeBSD. The best IAXmodem alternative is T38Modem, which is both free and Open Source.
Enables Microsoft Fax and Windows Fax and Scan, which are built into Windows, to send and receive T.38 and Audio Faxes using VoIP. ECM (Error Correction Mode) support.



