Sip

http://www.sansay.com/sansay_products.htm SIP / H.232 SBC Product from Sensay (La Jolla, CA) , apparently used by Flowroute

http://www.sansay.com/sansay_products.htm SIP / H.232 SBC Product from Sensay (La Jolla, CA) , apparently used by Flowroute

http://freeswitch.org/node/117 Asterisk vs FreeSWITCH (from lead freeswitch developer’s POV)

http://wiki.kolmisoft.com/index.php/Asterisk_Background_performance_test performance tests for asterisk on 4 Intel Cores @ 2GHz, 2 GB RAM, over sip, recorded media playback – results: saturates 100mb network at ~1000 simultaneous calls, one way GSM playback.

http://downloads.polycom.com/voice/voip/sip_sw_releases_matrix.html SIP Firmware for Polycom SoundPoint IP Phones and conf. devices

http://code.google.com/p/red5phone/ untested. just something to watch for.

http://www.pernau.at/kd/voip/bookmarks-sip-stacks.html comparation of SIP client libraries – not much of a comparation but a list of available SIP stacks with short notes

http://ask.slashdot.org/comments.pl?sid=596703&cid=23959669 ? “Why VoIP is usless when I download something on bittorent; can I twik my router to fix it” ?

http://www.freepbx.org/support/documentation/howtos/howto-setup-a-remote-sip-extension notes on how to setup a “remote extention”, i.e. you have asterisk PBX in the office, but you want to place 1 IP Phone at home. “IP phone at home” is the “remote extention”. Notes explain how to work around NAT gotchas.

http://www.telphin.ru/numbers.php DID in SPB, Russia