Conferencing: maximum number of users?


#1

What’s the maximum number of callers can talk in one conference? Is it possible to make one room where 30 people can talk and hear each other. What hardware do i need for such * server if the conferencing is the only feature of that server? What is difference if some callers are from IP network (SIP or H323) and some from Zap? More Zap - more power or otherwise?

Thanks in advance.