I found this when I was digging my old archives last weekend:
Call Recording Design
It was a quick slides I made to highlights the design of a (prototype of) call-recording application we implemented in late 2008. As you can see in the slides, this application facilitates both manual and automatic recording of calls made with contact-center agents.View more presentations from raka.angga.
The recording itself is achieved by dragging the contact-center agent and the customer into a dynamically-created conference room, and have a silent-participant in the room, taping the conversation.
It is a sub-optimal solution. A better one would be to use things like mediaproxy or rtpproxy (have the RTP streams in the call go through that proxy, and tap the packets right there). The reason we designed it that way -- using conference -- is because they wanted to make use of the media server (with support for conferencing) that they have bought.
The source code is opened now; should serve as an additional resource for you who just started SIP-application development. I don't have time at this moment to write a how-to deploy and run it, less the detail of the design & code.
I invite you to do it. If you'd like to take that invitation, please write me an email at raka.angga@gmail.com or you can simply drop a comment here. Your help on this will be greatly appreciated, and it would really help fellow engineers out there.
