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Introduction
9
DTMF
Dual Tone Multi-Frequency
EIA
Electronic Industry Association
FXS
Foreign Exchange Station
GK
Gatekeeper
H.323
ITU specification for multimedia transmission over IP
networks
ICMP
Internet Control Message Protocol
IFP
Internet Facsimile Protocol
IMTC
International Multimedia Telecommunications
Consortium
IP
Internet Protocol
ISP
Internet Service Provider
ITG
Internet Telephony Gateway
KTS
Key Telephone System
LAN
Local Area Network
PPP
Point-to-Point Protocol
PPPoE
PPP Over Ethernet
NAT
Network Address Translation
NAPT
Network Address Port Translation
NVS
Non-Volatile Storage
PBX
Private Branch Exchange
PSTN
Public Switched Telephone Network
RAM
Read-Write Memory
RAS
Registration, Admission and Status
RCF
Registration Confirmation
RRQ
Registration Request
RTP
Real-Time Transport Protocol
TFTP
Trivial File Transfer Protocol
UDP
User Datagram Protocol
UUIE
User-to-User Information Element
VAD
Voice Activity Detection
WAN
Wide Area Network