Inter-Asterisk eXchange
Inter-Asterisk eXchange (IAX) is a communications protocol native to the Asterisk private branch exchange (PBX) software, and is supported by a few other softswitches, PBX systems, and softphones. It is used for transporting voice over IP telephony sessions between servers and to terminal devices.
| Communication protocol | |
| Abbreviation | IAX |
|---|---|
| Purpose | VoIP |
| Developer(s) | Mark Spencer |
| Introduction | |
| Influenced | IAX2 |
| OSI layer | Application layer |
| Port(s) | 4569 |
| RFC(s) | RFC 5456 |
| Internet protocol suite |
|---|
| Application layer |
| Transport layer |
| Internet layer |
| Link layer |
The original IAX protocol is deprecated and has been superseded by a second version, commonly called IAX2. The IAX2 protocol was published as an informational (non-standards-track) RFC 5456 by discretion of the RFC Editor in February 2010.
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