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Message * Articles On Voip Software, including Yahoo! Messenger, Skype, Cisco Unified Communications Manager, Sightspeed, Echolink, H323plus, Google Talk, Teleo, X-lite, Kphone, Pgpfone, Sipx, Gizmo5, Net2phone, Roger Wilco (software), Qutecom - 1242972234 - 9781242972232