IP telephony / full-duplex / LAN / XML / screen saver / Point-to-Point Protocol / Internet Control Message Protocol / Smart Phone / Real Time Protocol / Lightweight Directory Access Protocol / VPN / MAC address / Real Time Control Protocol / mobile phones / MP3 / Quality of Service / UDP / SSL / WAN / Wi-Fi / Voice algorithms / Encryption / Ethernet / cellular telephone / Dynamic Host Configuration Protocol / Secure Real Time Protocol / DNS / proxy server / Uniform Resource Identifier / Network Address Translation / HTTP / Network Time Protocol / IPv4 / VOIP / Bluetooth / Address Resolution Protocol / PBX / web server / media encryption / /