Hi ,
Thanks all for your reply... So I just need the clarifications.
1) Can CRBT be played without Reliable provisional Response? If yes then
whether the SDP is required in that unreliable provisional response?
2) Also since Paul already replied that as per RFC 6337 there should not be
any
Hi Paul,
Yes, it seems that Sourav's concern is with early media as you can also see
from the call diagram that he sent. CRBT stands for "colorful ringback tone",
it is actually a specific song or audio file to play instead of the standard
ring tone. As you said, it is possible that the early
On 10/15/14 12:16 PM, Mustafa AYDIN wrote:
Hi Vivek,
I agree most of your comment, however considering that the question here
is “can CRBT palyed without Reliable Provisonal response.” and due to
the fact that CRBT is an actually an _early media RTP flow_ (played
before 200 OK), there is nothin
Hi Vivek,
I agree most of your comment, however considering that the question here is
“can CRBT palyed without Reliable Provisonal response.” and due to the fact
that CRBT is an actually an early media RTP flow (played before 200 OK),
there is nothing to prevent UAC to get the CRBT in this sc
Hi Sourav,
The UAS cann't send new offer in initial INVITE as per standards.
Although above scenario can be propitiatory where sdp in 200 OK can be
treated as answer but again as per standards sdp should be same in 1xx and
2xx responses. This will depend on client but yes above can work in
Phil,
I agree the messaging after 200 ok is incorrect but the main question is with
the CRBT which is sent before 200 ok. Why do u think that the client would not
get early media if the sdp in INV is correct ?
Rgrda
Mustafa
From: sip-implementors-boun...@lists.cs.columbia.edu
[sip-implemento
Sourav,
Sorry I thought Inv is sent without sdp. I believe the UAC should be able to
get CRBT in your call scenario.
Rgrds
Mustafa
From: Mustafa AYDIN
Sent: Wednesday, October 15, 2014 5:41 PM
To: VARUN BHATIA; Sourav Dhar Chaudhuri
Cc: sip-implementors@lists.cs.columbia.edu
Subject: RE: [Sip-i
On 10/15/14 10:22 AM, Sourav Dhar Chaudhuri wrote:
Hi,
Can CRBT works without using Reliable Provisional Response ?
A INVITE (with SDP offer) > B
A <=== 180 ringing (with SDP answer ) B
---
Hi Sourav,
The client would not get CRBT unless there is reliable prov response, because
the server would not know where to send early media rtp packets. If there was a
prack mechanism then the sdp of the client would be sent in prack message and
early media scenario would be successful.
Thnks
Hi Sourav,
You cannot send an offer unless you receive an acknowledgement
corresponding to your answer therefore you can send SDP in 200 OK but
it will be treated as an answer only.
Normally clients honor both the answers but standards say it should
honor first answer if I am not missing anything
Hi,
Can CRBT works without using Reliable Provisional Response ?
A INVITE (with SDP offer) > B
A <=== 180 ringing (with SDP answer ) B
--> It is not a RPR
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