How to multicast?

Deoksoo Song (
Thu, 30 May 96 16:56:14+090

Hello! I'm Dennis Song from Korea.
I heard that Cuseeme multicasts video streams.
But even though my computer is not connected to multicast router which manages
tunneling, I can receive multiple video streams.
I really wanna know how it works.
If Cuseeme use multicasting, it must use MBONE. Does it use MBONE?
If cuseeme does not use multicasting, How does it control multple channels of
participants? Does it use point-to-point connection to each participant?

Thanks in advance.