User guide

System Administrator’s Guide – Release 7.5
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Revised: April 9, 2013
Page 215
33 Abbreviations
Abbreviation Definition
BLF Busy Lamp Field
DHCP Dynamic Host Configuration Protocol
DID Direct Inward Dialing
DND Do Not Disturb
DNS Domain Name System
DOD Direct Outward Dialing
DTMF Dual Tone Multi-Frequency
FTP File Transfer Protocol
FXO Foreign Exchange Office
HTTP Hypertext Transfer Protocol
IP Internet Protocol
ITSP Internet Telephony Service Provider
LAN Local Area Network
NAT Network Address Translation
PBX Private Branch Exchange
PFK Programmable Function Key
PoE Power Over Ethernet
POP Post Office Protocol
PPTP Point-to-Point Tunneling Protocol
RTP Real-time Transport Protocol
SIP Session Initiation Protocol
SMTP Simple Mail Transfer Protocol
SNTP Simple Network Time Protocol
TCP Transmission Control Protocol
UDP User Datagram Protocol
URI Uniform Resource Identifier
VoIP Voice over Internet Protocol
WAN Wide Area Network