http://wiki.kolmisoft.com/index.php/How_fast_MOR_can_perform asterisk performance tests done by Kolmesoft (manufacturer of voiop soft switch based on asterisk). ~ 500-600 stimult. calls, in all cases seems to be limited by external factors (network, mysql on the same machine, etc). Error rate (% of dropped calls, call quality) was not recorded on those tests
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://wapo-spb.livejournal.com/3912.html asterisk stress testing (Livejournal post in russian )
http://downloads.polycom.com/voice/voip/sip_sw_releases_matrix.html SIP Firmware for Polycom SoundPoint IP Phones and conf. devices
http://www.slideshare.net/twilio/reinventing-the-dialplan-slides-from-twilios-astricon-2009-talk Company provides Virtual PBX - asterisk “in the cloud”, with HTTP/XML/REST API (business-level google voice)
http://www.skype.com/intl/en/business/products/pbx-systems/asterisk/ “channel skype” asterisk module, allows you to connect your asterisk box to skype
http://www.simionovich.com/ useful blog about voip tech and asterisk
http://openbts.sourceforge.net/background.html basically how to build your own gsm cell or private cellullar network on a budget. Very interesting project, requires radio engeening knowlegde and familiarity with telecom and gsm stuff. Also see http://openbts.sourceforge.net/ for links about field tests at Burning Man 2008
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://forum.voxilla.com/linksys-sipura-voip-support-forum/do-craft-dial-plan-string-9511.html form post explaining Sipura/Linksys 3XXX dial plan syntax