An investigation into the provision of video conference

capabilities in iLanga

Supervisors: Alfredo Terzoli and Peter Clayton

Fred OttenStudent Number: 605O5894

What is Asterisk?

• “flexible and extensible suite of intergrated telecommunications software that can be molded to suit any particular application, or collection of applications”

• Goal is to support every possible telephony technology

• Acts as a middleware

Features of Asterisk

• Telephony applications such as:– Call bridging– Conferencing– Call parking– Call forwarding

• Will be useful to me, as these facilities will be available to the video channels.

iLanga

• Main components– Asterisk– SIP Express Router (SER)– OpenH323 Gatekeeper (OpenGK)

iLanga

• SER and OpenGK were added to increase functionality for the SIP and H.323 clients

Statement of Problem

• Channel-based architecure of Asterisk provides a means to bridge the transport of voice between various protocols

• In principle the architecture should allow the transport of video with relative ease

What I will do

• Investigate the channel structure for voice transmission and gain a deep understanding of how the channel architecture operates

• From this build an adapter to allow video transport

What I hope to achieve

• “Video conferencing” using the SIP channel and the ISDN channel

• Understanding of the structure, and its limitations and further extensions

Further Extensions

• Video on demand (streaming) for all terminals using Asterisk

• Channel for Analogue video system, which would ensure Legacy compatibility

• Others relating to the channel structure (will become clearer as the project takes form)

Current situation

• Doing research into the structures

• Developing web page

• Will be soon starting the reading of code, and experimentation

Questions ???