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://www22.verizon.com/wholesale/solutions/solution/sip%2Bgateway%2Bservice.html don’t know if that’s any good. I.e. quality/features i think should be just fine, but pricing + support - I dunno.
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://forum.voxilla.com/linksys-sipura-voip-support-forum/do-craft-dial-plan-string-9511.html form post explaining Sipura/Linksys 3XXX dial plan syntax
http://www.rowetel.com/blog/?p=61 IP04 (embedded asterisk on blackfin board ) power improvements
http://www.pikatechnologies.com/english/View.asp?x=608 asterisk appliance based on 400Mhz AMCC PowerPC. 1xFXS, 1x10/100Eth , expendable up to 8xFXO/FXS/BRI via modules. Sold with SDK and cross-compiler tool-chain
http://www.linux.com/feature/128386 Smaple AGI scripts in PHP
http://mcn.ru/phone/ check it out if u need DID in moscow