Subject: [Megaco] About a service control over a media server

From: �̵�ǥ <[email-masked]>
Date: Thu, 19 Jun 2003 11:01:50 +0900

Hi, all..!
I'm Lee from Korea.
I got to have some questions while developing a media server.

                                            SIP  (1)
AS(Appication Server) ---------------- 
              |                                  |
              | SIP (2)                       |
              |           Megaco  (3)      |
       Softswitch --------------------> Media Server

Let's assume that a new call is set up through megaco protocol between the softswitch and the media server as picture above.
There are several ways that we can  proceed the service flows after a call setup.

          SIP
1. AS------->Media Server

          SIP                  Megaco
2. AS------->Softswitch------->Media Server

According to 1, AS directly controls over the media server for the service procedure by using SIP.
In the case of 2, the media server is controlled by the softswitch through Megaco for the service procedure.

If we use 1, I think the media server must have some function for associating (3) call with (1) service control.

---[1]. Do you know any algorithm or good way to solve this problem?
---[2]. In addition, I have no idea how AS can control the service. (call flow)
---[3]. I have tried to find some documents or drafts about the ways of service control (I mean in detail), but I couldn't.

Do you guys have any idea on this?