Subject: Re: [Megaco] SDP in Signal Descriptor ????

From: Christian Groves <[email-masked]>
Date: Thu, 03 Jan 2008 11:41:48 +1100

Hello Atul,

[CNG] In all cases other than what is specified in Q.1950 you should 
include SDP in the media descriptor if using the text encoding. Q.1950 
uses SDP tunnelling as a "form" of bearer control protocol. The 
tunnelling is used to pass the SDP information (unchanged by the MGC) to 
the remote end. SDP in the media descriptor is under control of the MGC.

Regards, Christian

atul garg wrote:
> Hi All,
>
> I have a query regarding SDP in h248/Megaco.As far as
> iu know SDP part can come in Media Descriptor only.
> But what if , if i receive some SDP info in Signal
> Descriptor as "Bearer  Control Tunnelling Q.1950 Annex
> A" and in its signal parm list ,i have complete SDP.
>
> 1) I would like to know when do i need to tunnel SDP
> information throuigh Signal Descriptor when i can send
> it through Media Descriptor only.
>   

> 2)If it is so, does it have the same meaning as when
> it comes in Media Descriptor ie. can these values be
> used instead of SDP part comes in Media Descriptor.
>
> Regards
>
>
>
>
>
>
>
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