11 Oct
2006
11 Oct
'06
1:32 a.m.
Max Gregorian wrote:
As they all said above.
I think IAX is supported on some Cisco equipment for WAN connectivity,
making it useful for interconnecting back-end systems and servers (e.g.
server to server rather than server to UA).
I believe IAX uses the same port(s) for signalling as for media, as
compared to SIP vs RTP using separate streams. This makes it easier when
doing port-forwarding and may give it an advantage for NAT traversal.
That being said, it is not yet an officially recognised protocol (from
what I heard) and has not yet been as widely adopted as SIP. In short,
you will find more SIP-enabled devices than you will find IAX devices,
though there are some IAX softphones around.
IAX is definitely not supported by Cisco. Perhaps you were thinking of
some other protocol?
You are correct, IAX uses the same ports for signaling and media.
--
Kristian Kielhofner