[SIPForum-discussion] Media Play Call Flow

[XuRui]

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" <sivam at motorola.com>
To: <discussion at sipforum.org>
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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