[SIPForum-discussion] Finall what codec they are using..

[vijay kant gupta]

Assume Controller dosent have any Trans coding Functionality.
And Assume SDP contain only single codec. In case 8 step should be SDP3 ,
as per my understanding.

So I think  ccall should be finally establish on SDP3  .




On Mon, Dec 10, 2012 at 9:14 AM, Abhisek Acharya
<abhisek.acharya at gmail.com>wrote:

> hey Vijay,
>
> Ideally call should be established with the common codec or at times if
> more than one common codec are available call can be established with
> the prioritized codecs.
> In your case if you want to see just capture a RTP packet and peep inside
> that.
>
> Regards
> Abhisek Acharya
> PUNE
>
>
> On Fri, Dec 7, 2012 at 11:21 AM, vijay kant gupta <
> vijaykant.it2002 at gmail.com> wrote:
>
>>
>> Hi Can any body suggest Finally Call setp with which Common SDP. .
>> Or it need correction.. last 200 Ok should contain Sdp3.
>>
>>
>>              A              Controller               B
>>              |(1) INVITE bh sdp1 |                   |
>>              |<------------------|                   |
>>              |(2) 200 sdp2       |                   |
>>              |------------------>|                   |
>>              |                   |(3) INVITE sdp2    |
>>              |                   |------------------>|
>>              |(4) ACK            |                   |
>>              |<------------------|                   |
>>              |                   |(5) 200 OK sdp3    |
>>              |                   |<------------------|
>>              |                   |(6) ACK            |
>>              |                   |------------------>|
>>              |(7) INVITE sdp3    |                   |
>>              |<------------------|                   |
>>              |(8) 200 OK sdp2    |                   |
>>              |------------------>|                   |
>>              |(9) ACK            |                   |
>>              |<------------------|                   |
>>              |(10) RTP           |                   |
>>              |.......................................|
>>
>>
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