[SIPForum-discussion] Media Play Call Flow - discussion Digest, Vol 21, Issue 28

Wed Apr 18 16:32:39 UTC 2007

Hi,

  Just wanted to know if the SIP Reason header of  Provisional Response "181 Call  is being forwarded" code will not help to indicate the cal is being forwarded?  There are some extensions to 1xx responses to indicate the reason for forwarding.

  Could you check the call flow http://www.tech-invite.com/Ti-sip-service-9.html bullet 9.Call Forwarding NoAnswer?
   Is this what you are lookin for?

  Thanks,
  Chetana

1. Re: Media Play Call Flow (gurudatt balaji)

----------------------------------------------------------------------

Message: 1
Date: Wed, 18 Apr 2007 18:49:57 +0530
From: "gurudatt balaji" 
Subject: Re: [SIPForum-discussion] Media Play Call Flow
To: XuRui , "Siva M-Q16748" ,
alexzhang at gdnt.com.cn, discussion at sipforum.org
Message-ID:
<85ddb520704180619k4960d2d3o6c7c766a2c6cb55c at mail.gmail.com>
Content-Type: text/plain; charset="iso-8859-1"

Hi all,

I've a small update,

408 will not be sent from the user B(usually 408 is sent from server),
Actually after timeout, AS will send CANCEL to B and B will respond with
487-Req Terminated.

AS<---->B
----------------
CANCEL-->
<--200OK
<--487
ACK-->

How MS will release the established RTP session after playing announcement.?
-By sending BYE, does this BYE is fwded to A?
-Does BYE will have any impact on A while sending Invite of C?

Pls let me know ur comments.

Reg
Balaji

On 4/18/07, XuRui wrote:

> Hi Siva,
>
> Well...
> So sorry that the re-INVITE is unnecessary at all.
> The 200(INVITE) takes C's SDP.
>
> I confused myself that I thought the 180 to A is a 183(With SDP).
> -__________-b
>
> Regards,
> Xu Rui
>
> ----- Original Message -----
> From: "Siva M-Q16748" 
> To: "XuRui" ; ;
> 
> Sent: Wednesday, April 18, 2007 7:00 PM
> Subject: RE: [SIPForum-discussion] Media Play Call Flow
>
> Hi Xu Rui
>
> Thanks for the flow
>
> I did not understand why is the first re-INVITE towards A required
>
> The media info got from the MS could be sent to A in the 200 OK itself
>
> Whats your view ??
>
> Thanks
> Siva M
>
> -----Original Message-----
> From: XuRui [mailto:BeShrek at msn.com]
> Sent: Wednesday, April 18, 2007 2:32 PM
> To: alexzhang at gdnt.com.cn; Siva M-Q16748; discussion at sipforum.org
> Subject: Re: [SIPForum-discussion] Media Play Call Flow
>
> Hi Siva,
>
> The sequence is broken by the mail client.
> I put it in a text file as attachment.
> There's no "re-INVITE" to C.
> The "INVITE" to C is a new one.
>
> PS:I think alex is right. :)
>
> Regards,
> Xu Rui
>
> ----- Original Message -----
> From: 
> To: ; ; 
> Sent: Wednesday, April 18, 2007 4:58 PM
> Subject: RE: [SIPForum-discussion] Media Play Call Flow
>
> I think the announcement is played for A to be informed the call is
> forwarded.
>
>
> -- A l e x
>
> -----Original Message-----
> From: discussion-bounces at sipforum.org
> [mailto:discussion-bounces at sipforum.org] On Behalf Of XuRui
> Sent: Wednesday, April 18, 2007 4:30 PM
> To: Siva M-Q16748; discussion at sipforum.org
> Subject: Re: [SIPForum-discussion] Media Play Call Flow
>
> Hi,
>
> I hope this sequence will be what you need.
> But it looks something strange for me that B could listen to
> announcement after it times out.
> Hope it helpful.
>
> A AS B C
> MS
> | INVITE | | |
> |
> |------------------>| INVITE | |
> |
> | 100 |------------------>| |
> |
> |<------------------| | |
> |
> | | 100 | |
> |
> | |<------------------| |
> |
> | | 180 | |
> |
> | 180 |<------------------| |
> |
> |<------------------| | |
> |
> | | 408 | |
> |
> | |<------------------| |
> |
> | | ACK | |
> |
> | |------------------>| |
> |
> | | | |
> |
> | | INV | |
> |
> | |------------------>| |
> |
> | | 100 | |
> |
> | |<------------------| |
> |
> | | 200 | |
> |
> | |<------------------| |
> |
> | | ACK | |
> |
> | |------------------>| |
> |
> | | | |
> |
> | | INV | |
> |
> |
> |---------------------------------------------------------->|
> | | INV | |
> |
> | |-------------------------------------->|
> |
> | | 100 | |
> |
> |
> |<----------------------------------------------------------|
> | | 100 | |
> |
> | |<--------------------------------------|
> |
> | | 200 | |
> |
> |
> |<----------------------------------------------------------|
> | | ACK | |
> |
> |
> |---------------------------------------------------------->|
> | | re-INVITE | |
> |
> | |------------------>| |
> |
> | | 100 | |
> |
> | |<------------------| |
> |
> | | 200 | |
> |
> | |<------------------| |
> |
> | | ACK | |
> |
> | |------------------>| |
> |
> | | 200 | |
> |
> | |<--------------------------------------|
> |
> | | ACK | |
> |
> | |-------------------------------------->|
> |
> | 200 | | |
> |
> |<------------------| | |
> |
> | ACK | | |
> |
> |------------------>| | |
> |
> | re-INVITE | | |
> |
> |<------------------| | |
> |
> | 100 | | |
> |
> |------------------>| | |
> |
> | 200 | | |
> |
> |------------------>| | |
> |
> | ACK | | |
> |
> |<------------------| | |
> |
> | | | |
> |
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> ~~~~~~~~~~~
> | | Session Media... |
> |
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> ~~~~~~~~~~~
> | | | |
> |
>
>
> Regards,
> XuRui
>
> ----- Original Message -----
> From: "Siva M-Q16748" 
> To: 
> Sent: Wednesday, April 18, 2007 3:41 PM
> Subject: [SIPForum-discussion] Media Play Call Flow
>
> > Hi
> >
> > Could anyone help me with how the call flow should be for the below
> > mentioned scenario
> >
> > A calls B
> > B Rings and Times out
> > Application server sends INVITE for C
> > Parallelly Application server has to play announcement for B that call
>
> > is being Forwarded.
> > Once C answers A and C should get connected .
> >
> > Regards,
> > Siva M
> >
> > _______________________________________________
> > This is the SIP Forum discussion mailing list TO UNSUBSCRIBE, or edit
> > your delivery options, please visit
> > http://sipforum.org/mailman/listinfo/discussion
> > Post to the list at discussion at sipforum.org
> >
> _______________________________________________
> This is the SIP Forum discussion mailing list TO UNSUBSCRIBE, or edit
> your delivery options, please visit
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> Post to the list at discussion at sipforum.org
>
> _______________________________________________
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> TO UNSUBSCRIBE, or edit your delivery options, please visit
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> Post to the list at discussion at sipforum.org
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