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Title : IAX2: Inter-Asterisk eXchange Version 2
Author(s) : B. Capouch, et al.
Filename : draft-guy-iax-03.txt
Pages : 116
Date : 2007-4-18
This document describes the Inter-Asterisk eXchange protocol, Version
2, (IAX2) an application-layer control and media protocol for
creating, modifying, and terminating multimedia sessions over
Internet Protocol (IP) networks. IAX2 was developed by the open
source community for the Asterisk PBX and is targeted primarily at
Voice over Internet Protocol (VoIP) call control, but it can be used
with streaming video or any other type of multimedia.
IAX2 is an "all in one" protocol for handling multimedia in IP
networks. It combines both control and media services in the same
protocol. In addition, IAX2 uses a single UDP data stream on a
static port greatly simplifying Network Address Translation (NAT)
gateway traversal, eliminating the need for other protocols to work
around NAT, and simplifying network and firewall management. IAX2
employs a compact encoding which decreases bandwidth usage and is
well suited for Internet telephony service. In addition, its open
nature permits new payload types additions needed to support
additional services.
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