บรรณานุกรม
[1] voip-info.org,"What is VOIP",<http://www.voip-info.org/wiki/view/What+is+VOIP>
[2] Nectec.or.th,"Market Intelligent",<http://www.nectec.or.th/bid/mkt_info_tech_voip.htm>
[3] wikipedia.org,"Voice over Internet Protocol",<http://en.wikipedia.org/wiki/Voice_over_Internet_Protocol>
[4] วิชาการ.คอม,"การสื่อสารด้วยระบบ VoIP",<http://www.vcharkarn.com/varticle/17875/2>
[5] voipthailand,"การสื่อสารด้วยระบบ Voice-over-IP(VoIP)",<http://www.voipthailand.com/voip/articles/voip_articles.html>
[6] sans.org,"SANS InfoSec Reading Room - VOIP Issues",<http://www.sans.org/reading_room/whitepapers/voip/>
[7] Steve Ford,"VoIP and Amateur Radio",<http://www.arrl.org/qst/2003/02/VoIP.pdf>
[8] tridi.ntc.or.th ,”Voice Over Internet”,<http://tridi.ntc.or.th/uploadfiles/voip20090123.pdf>
[9] Nectec.or.th,"VoIP status in thailand",<http://www.tridi.ntc.or.th/library/upload/c6.pdf>
[10] kmutt.ac.th,"VoIP(Voice Over Internet)",<http://www.kmutt.ac.th/gmi/2005/mambo/images/stories/VoIP.pdf>
[11] Protocols,"Stand of Protocol",<http://www.protocols.com/pbook/h323.htm#H323SET>
[12] widebase,"Gateway",<http://www.widebase.net/knowledge/itterm/it_term_desc.php?term_id=gateway>
[13] ku.ac.th,"QoS (Quality of Service)",<http://www.ku.ac.th/magazine_online/qos.html>
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