[Asterisk-java-users] Asterisk and PSTN

[Gabriele C. <gab...@ti...>]

Hello,
surely it is a pretty basic topics, but I have some doubt about pstn/sip.
I should set up a "conference center" with asterisk, with users joining 
the conferences with public pstn numbers, and so I think I should have a 
pool of public pstn numbers available. Now, I am really confused about 
my needs: I think I should get a channel bank, link it with the server 
asterisk with a T1 on one side, and receive incoming call from pstn on 
the other side. Is it correct? And what service should I ask to my telco 
for this setting to work? I should be able to connect about 200 users in 
the same time: what time of service/hardware should be required?
Thanks for your help
Gab