[SIPForum-discussion] Codec negotiation on a 3 way conference call.

[Andrew Yu]

Hi Abhinav,

It depends which device is conducting media mixing, if anyone of the 2 
devices support both G722 & G729 is conducting media mixing, there 
should be any issues when the third device joins, unless codec 
negotiation fails somehow. Thanks.

-- 
Cheers,

Asiatel Singapore Pte Ltd
Andrew Yu

19 Jalan Kilang Barat
#06-01, Acetech Centre
Singapore 159361

Tel: +65 6271 8233
Fax: +65 6274 4266


Abhinav Gandhi wrote:
> Hi All,
>
>   A very interesting scenario:
>
> - I have 2 devices that support G722 WBA codec and they are in a conversation.
> - Both these devices support a list of codecs and were set to 'automatic codec negotiation' with G722 as top priority.
> - A third device which does not support G722 at all but has G729 (one of the codecs supported by the initial 2 devices but only with 2nd priority) calls in.
> - Three party calling and conferencing is supported by the platform.
>
>  Can these 3 devices talk simultaneously? 
>
> Regards,
> Abhi
>
> P:S: Andrew Yu, the voice codec expert? Have something to say? I have seen your responses for any issue reg codecs!
>
> --------------------------
> Sent using BlackBerry
>
>
> -----Original Message-----
> From: discussion-bounces at sipforum.org <discussion-bounces at sipforum.org>
> To: sreekant nair <sreekant_nair at yahoo.com>
> CC: discussion at sipforum.org <discussion at sipforum.org>
> Sent: Mon Sep 03 17:15:20 2007
> Subject: Re: [SIPForum-discussion] G 723 Audio Codec Bit Rate
>
> Hi Sreekant,
>
> This is very interesting, if you still have the trace, please sent to me 
> the trace which includes both SIP/w SDP & RTP. I prefer it in .pcap 
> format unaltered. Thanks!
>
>