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Glossary-4
UDP User Datagram Protocol
UTP/STP Unshielded Twisted Pair/Shielded Twisted Pair
V.35/V.36 ITU-T standard synchronous physical layer protocol between
a network access device and a packet network.
VAD Voice Activity Detection
VLAN Virtual Local Area Network
VME VersaModule Eurocard
VoFR Voice over Frame Relay
VoIP Voice over Internet Protocol
WAN Wide Area Network
X.21 ITU-T standard serial communications over synchronous
digital lines used primarily in Europe and Japan
X.25 CCITT recommendation for interface between data terminal
equipment and packet-switched data networks.
(See Telnet.)
ZAP Console terminal command-line utility
Term Meaning