I am just using pcmu codec cause that is what my VOIP termination service provides. Also I don't have actual bandwidth benchmark test numbers but it looks like it is about 80 kbps per channel one way which equals 80*2*1000 = 168 Mbps. I like to use sipp for testing it is a little hard to use but it gives you an idea what your servers can handle. As for voice quality it has some very minor skipping around 750-850 then around 1000-1100 it get major fast. So figure out what your server can handle then limit it to that if you need more channels add more freeswitch servers. I've found that when dealing with lots of channels be sure that kernel timer is not changing too much. For more info On Performance check out this page on the wiki http://wiki.freeswitch.org/wiki/Performance_testing_and_configurations Hope this information is helpful Thanks Craig Zimmerman -----Original Message----- From: freeswitch-dev-bounces@lists.freeswitch.org [mailto:freeswitch-dev-bounces@lists.freeswitch.org] On Behalf Of freeswitch-dev-request@lists.freeswitch.org Sent: Wednesday, December 14, 2011 9:25 PM To: freeswitch-dev@lists.freeswitch.org Subject: FreeSWITCH-dev Digest, Vol 66, Issue 9 Send FreeSWITCH-dev mailing list submissions to freeswitch-dev@lists.freeswitch.org To subscribe or unsubscribe via the World Wide Web, visit http://lists.freeswitch.org/mailman/listinfo/freeswitch-dev or, via email, send a message with subject or body 'help' to freeswitch-dev-request@lists.freeswitch.org You can reach the person managing the list at freeswitch-dev-owner@lists.freeswitch.org When replying, please edit your Subject line so it is more specific than "Re: Contents of FreeSWITCH-dev digest..."