[SIPForum-discussion] SIP and 3G-324M

Eric Burger eburger at brooktrout.com
Tue Oct 18 13:24:06 UTC 2005

H.324m is the multiplex of video sigaling (H.245) and media (typically H.263 and either G.711 or AMR), transported over ISDN (in an H.225.0 multiplex).  In 'sip' networks, SIP takes the call setup roll of ISUP, as well as much of the media negotiation of H.245.

3G SIP networks don't need 2.5G ISDN signaling.  2.5G networks don't use SIP for call setup.

There are products that gateway between SIP/RTP and ISDN/H.225.0

 -----Original Message-----
From: 	Irwin Lazar [mailto:ilazar at burtongroup.com]
Sent:	Thu Oct 13 15:51:05 2005
To:	An open list for discussion of SIP-related topics
Subject:	[SIPForum-discussion] SIP and 3G-324M

Hi Folks, I¹m doing a bit of reading on the delivery of video (and
potentially video conferencing) over mobile networks and I¹m beating my head
against a wall trying to understand the respective roles of 3G-H324M and

Am I right in assuming that 3G-324M is a short-term solution for the
delivery of multimedia over 3G networks, and at some point in the future
(presumably after IMS becomes a reality) SIP will replace it?

Or, are they complementary protocols?

Thanks in advance,

Irwin Lazar, CISSP
Senior Analyst, Burton Group
ilazar at burtongroup.com
Phone: 703-742-9659
AIM/iChat/Gizmo/Google/Skype: imlazar

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