can anyone tell me what should be my server configuration to handle 50 concurrent calls with asterisk?
http://www.voip-info.org/wiki/view/Asterisk+hardware+recommendations
Generally, though, the processing needs could vary greatly, depending on things like the choice of codecs, whether the media can be re-invited out of the switch, music on hold, etc. You will find it hard to get anyone to tell you anything except what works for them.
50 channels is not a lot. I would say pretty much any newer machine with a decent multi-core processor should be able to handle 50 concurrent calls. The only caveat would be using G.729 in a way that asterisk was required to transcode 50 input and 50 output streams.
Hi
This is the output from a 2.6GHz dualcore sever with 2G ram and as you see 209 sipchannels in conferences.
OK 01-11-2009 11:31:14 2d 14h 50m 43s 1/4 OK Channels: SIP (209)
OK 01-11-2009 11:18:18 25d 16h 41m 0s 1/3 OK - load average: 0.08, 0.21, 0.23
Ian
please note, that I am almost positive Ian is referring to app_conference and NOT MeetMe. I would never try to have 100 MeetMe conferences on one server… recipe for disaster!
you said it not me 
Ian