I'm looking for a place to terminate US domestic, Canada and international
calls over IP (SIP or IAX). Cost should be in the neighborhood of average
$.01/min US domestic.
I would like to use it for setting up a call back server and provide
call back services to my clients.
Thanks...

1 comment… read it below or add one
http://www.voipforums.com/forum_posts.asp?TID=336&get=last
http://lists.digium.com/pipermail/asterisk-biz/2004-September/000602.html
http://www.sipcenter.com/sip.nsf/html/Service+Providers+2
https://www.rocketvoip.com/rocketvoip-telecommunication-resources.aspx