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![]() Date: 2008-06-23 03:12:30Videotelephony Session Initiation Protocol Business telephone system Internet telephony service provider SIP Trunking SIP connection Public switched telephone network Ingate IP PBX Telephony Electronic engineering Computer-mediated communication | Source URL: www.ingate.comDownload Document from Source WebsiteFile Size: 313,50 KBShare Document on Facebook |