[SIPForum-discussion] Is voice path before 200 OK is valid ?

[sreekant nair]

If my understanding is correct, the arrow showing the RTP (before 200OK) cannot be a BI-DIRECTIONAL arrow and should be an arrow from B ---> A. I have seen this happen. for e.g.The ring back tone from the terminator of the call can be sent as RTP media  stream that is generated at the UA end itself. Some time the proxy at UA-A may play the tone, else, it can act as a pass through and choose to play whatever media comes from the terminator of the call. 

Thanks
Sreekant


----- Original Message ----
From: ganesh gouda <gkgouda at gmail.com>
To: Sharanagoud BD. <sharanagoud_bd at spanservices.com>
Cc: SIP <discussion at sipforum.org>
Sent: Monday, June 9, 2008 9:30:03 AM
Subject: Re: [SIPForum-discussion] Is voice path before 200 OK is valid ?


Hi sharngoud, 
would u like to tell me how it is valid scenario with out final responce coming from  UA.
I am sorry i am new to SIP,i want to know more regarding the same.

 
On 6/9/08, Sharanagoud BD. <sharanagoud_bd at spanservices.com> wrote: 
This is valid scenario
 
Thanks,
Sharanagoud.
   
 


________________________________
 From: discussion-bounces at sipforum.org [mailto:discussion-bounces at sipforum.org] On Behalf Of Shakthi
Sent: Monday, June 09, 2008 12:32 PM
To: SIP
Subject: [SIPForum-discussion] Is voice path before 200 OK is valid ?

 
 
Is voice path before 200 OK is valid ?
 
Pls look at the call flow:
 
    A                                B
 
              INVITE
     --------------------------------->
            180 Ringing
    <---------------------------------
           RTP (g.723)
    <-------------------------------->
            200 OK
     <-------------------------------
            RTP (g.723)
     <------------------------------>
            ACK
      ------------------------------->
            BYE
      <-----------------------------
            200 OK
       ------------------------------->
 
Is this a valid call flow?
Can RTP come in to the scene before 200 OK?
 
- Thanx
  

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