User`s guide

System Administrator’s Guide – Release 7.2.3.x
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Revised: September 1, 2010
Page 134
29 Abbreviations
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
FXS – Foreign Exchange Station
HTTP – Hypertext Transfer Protocol
IP – Internet Protocol
ISP – Internet Service Provider
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