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

Thu Apr 19 06:01:50 UTC 2007

Yes..but in that case MS will not be involved in the call.

--Balaji

On 4/18/07, Chetana A <chetanvekar at yahoo.co.in> wrote:
>
> 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
> > >
> > > _______________________________________________
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> > > your delivery options, please visit
> > > http://sipforum.org/mailman/listinfo/discussion
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> > >
> > _______________________________________________
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> >
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> End of discussion Digest, Vol 21, Issue 28
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