[h323plus] Multiplexing support in H323plus

Simon Horne s.horne at packetizer.com
Wed Dec 14 01:18:31 EST 2011


Josh

 

The multiplexing support requires H.460.19. GnuGk v3.0 supports H.460.19
Multiplexing. The multiplexing can be end to end using GnuGk and only uses 2
ports regardless of how many Calls and RTP sessions are running. The default
ports for h323plus are 2666 and 2667 and for GnuGk are 3000 and 3001. The
first port is multiplexed RTP and the second is multiplexed RTCP. RTCP is
mandatory for H.323 however there is little effect if it's blocked.

 

Simon 

 

From: h323plus-bounces at lists.packetizer.com
[mailto:h323plus-bounces at lists.packetizer.com] On Behalf Of J.C Mercier
Sent: 14 December 2011 14:33
To: h323plus at lists.packetizer.com
Subject: [h323plus] Multiplexing support in H323plus

 


Hi all,

looking through the h323plus code, I noticed it supports multiplexing for
H.460.19. Just a few questions;

1. Does H323plus also support RTP multiplexing without the need for h.460.19
(direct endpoint to endpoint)?
2. If it doesn't support endpoint to endpoint multiplexing, does limiting
RTP ports to only a few ports such as 10 to 12 (i.e. 3000 - 3010) opened
port always remain in that range or will this produce any side affects when
making a lot of calls?
3. With multiplexing support for H.460.19, is it 2 ports; 1 bi-directional
port for audio and 1 bi-directional port for video? is there a third port
for RTCP (QoS)?
4. Is sending/receiving  RTCP/QoS mandatory for H.323 systems? What affects
are there if this is not enabled?

Thanks for all your help

Josh

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