[Discover] fring – Make free mobile calls, IM with Skype, MSN Messenger, ICQ, Google Talk_, SIP & Twitter, ... http://www.fring.com/ (voip mobile symbian free)
 [Discover] Asterisk :: The Open Source Telephony Platform | http://www.asterisk.org/ (voip opensource telephony linux)
 [Discover] Voice-over-IP gateway for Google Talk, MSN and Yahoo Users http://www.gtalk2voip.com/ (voip tools voice telephony)
 [Discover] DID World Wide, International DIDs forwarded to PSTN and VoIP by SIP, IAX, H323, Skype, Gtalk, MSN ... http://www.didww.com/index.php (voip telephony did infotechnology)
 [Discover] voip-info.org - voip-info.org http://www.voip-info.org/ (telephony sip voip network)
 [Discover] Asterisk Forums :: Index http://forums.digium.com/ (telephony howto voip forums)
 [Discover] VoipStunt - The Free Calls Company http://www.voipstunt.com/en/splashvoipin.html (telephony free tools phone)
 [Discover] Fonality trixbox | The Open Platform for Business Telephony http://www.trixbox.com/ (telephony pbx opensource telephone)
 [Discover] home | Digium® - The Asterisk Company http://www.digium.com/en/ (telephony asterisk)
 [Discover] Asterisk on OpenWRT part 2 - Lest Blood Be Shed http://lestblood.imagodirt.net/archives/106-Asterisk-on-OpenWRT-part-2.html (telephony pbx tutorial wrt)
 [Discover] VOIP.ORG.UK http://www.voip.org.uk/ (telephony convergence voip wan)
 [Discover] 3CX http://www.3cx.com/ (telephony voicemail voip voice)
 [Discover] National Numbering Plans http://www.itu.int/oth/T0202.aspx?parent=T0202 (standard sms telephony numbering)
 [Discover] Kannel: Open Source WAP and SMS Gateway http://www.kannel.org/index.shtml (source telephony wap smsgateway)