So I did do a quick read on Asterisk. I think it is a great application. I do have a quick question before I delve deeper in Asterisk. Is Asterisk suitable for PC to PC calls through a web browser front end? Like a web server directs users to other users and the only equipment users have is a microphone. Can Asterisk provide this functionality or is it overkill? I know Asterisk can connect with phone lines but I don’t require it for my web site.
Asterisk does not have a web plug in however you can get or develop a web app that will work like a sip phone. Asterisk would handle the call flow, call routing etc.
This is where the problems start. you need to look at flash or Java as you will need a platform independant softphone.
IE it must work on IE firefox safari and opera to name but a few, as well as not caring about OS. if you knew all your users where on windoze with IE then there are some good activeX clients avalible.