[SIPForum-discussion] can any one tell me about the one waymediain this scenario.

[nithya kumar]

Hi Rajesh,

       

       Yes . you are rite. Always invite transaction will have 3 way
handshake. For media path 3 way handshakes is required.

       

 

 

 

 

Regards,

 

NithyaKumar.R |  Huawei technologies ,bangalore |  Mob- 9986035813

 

 

 

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From: discussion-bounces at sipforum.org
[mailto:discussion-bounces at sipforum.org] On Behalf Of Rajesh
Sent: Friday, January 04, 2008 8:32 PM
To: 'Deepanshu Gautam'; 'arun kumar'; discussion at sipforum.org
Subject: Re: [SIPForum-discussion] can any one tell me about the one
waymediain this scenario.

 

Hi Deepanshu,

 

   I have one doubt in your answer. If media session starts only after 3 way
hand shake, how media will be exchanged in case of early media. Is it starts
only after PRACK for Reliable Provision response, in case of early media? So
you are telling one session will be established after 2 way handshake. But
media can't be exchanged until 3 way handshake completed .

 

Regards

Rajesh

 

 

Rajesh K R

Software Engineer

Huawei Technologies

Bangalore

 

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From: discussion-bounces at sipforum.org
[mailto:discussion-bounces at sipforum.org] On Behalf Of Deepanshu Gautam
Sent: Friday, January 04, 2008 15:17
To: arun kumar; discussion at sipforum.org
Subject: Re: [SIPForum-discussion] can any one tell me about the one way
mediain this scenario.

 

What is your "media"? If it is media session to exchange media between A and
B then i the answer would be "No". The media session is establish only after
ACK. A session will be establish after initial INVITE (Which is called as
early dialog) but that is not used to exchnage media.

 

Deepanshu Gautam       Senior R&D Engineer
Research & Std Dept - App & Service Product Line
Huawei Technologies Co. Ltd. - P.R. of China
Tel: +86 25 84676090
Fax: +86 25 84676060
Mobile: +86 138 01583544
Email: deepanshu at huawei.com

----- Original Message ----- 

From: arun kumar <mailto:triarun at gmail.com>  

To: discussion at sipforum.org 

Sent: Friday, January 04, 2008 4:25 PM

Subject: [SIPForum-discussion] can any one tell me about the one way media
in this scenario.

 

HI Everybody,

 

 Here is  a Scenario , A SIP phone(A) communicates with SIP phone (B) across
the proxy

        

 

                        (A)  INVITE/SDP-----> (B)  and after the 180 ring
(B) responds with 200 OK/SDP

 

by this time (A) and (B) have exchanged the SDP  so before (A) sends an ACK
to (B) will there be a one way media from (A)  -- > (B) ?

                        

 



-- 
With Regards
Arun Kumar .P 


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