MS Live Communication Server issue

Archived from groups: comp.dcom.videoconf (More info?)

Hi,

unfortunally i have to work with the MS LCS 2005 (No H323 anymore, just
SIP). Now i want to find out how to enable the client - its the 'MS
Office Communicator' - for audio/video conferencing. Out of the box the
client only handles 1-to-1 audio/video streams. There are Radvision
Products, but what else?

Or do you know any other SIP-Clients/Servers with capability of
conferencing?

Thank you