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Date: 2014-02-07 21:44:08Videotelephony Session Initiation Protocol Session border controller SIP Trunking SIP connection VoIP phone Business telephone system Back-to-back user agent IP Multimedia Subsystem Telephony Electronic engineering Computer-mediated communication | ESBC 8528-4B diagram072610Add to Reading ListSource URL: www.innomedia.comDownload Document from Source WebsiteFile Size: 3,66 MBShare Document on Facebook |