CCITT Consultative Committee for International Telephony and Telegraphy
CON Connection-oriented network service
CNLS Connectionless network service
DHCP Dynamic Host Configuration Protocol
DNS Domain Name System
ENUM Electronic Numbers
ETSI European Telecommunications Standards Institute
IETF Internet Engineering Task Force
IP Internet Protocol
ISDN Integrated Services Digital Network
ITSP Internet Telephony Service Provider
ITU-T International Telecommunication
LAN Local Area Network
MGCP Media Gateway Control Protocol
MOS Mean Opinion Score
PBX Private Branch Exchange
PDA Personal Digital Assistant
PESQ Perceptual Evaluation of Speech Quality
PSQM Perceptual Speech Quality Measurement
PSTN Public Switched Telephone Network
QoS Quality of Service
RAS Registration, Admission, and Status
RSVP Resource Reservation Protocol
RTCP Real-time Control Protocol
RTP Real-time Transport Protocol
RTSP Real-time Streaming Protocol
SAP Session Announcement Protocol
SCCP Skinny Client Control Protocol
SCTP Stream Control Transmission Protocol
SDP Session Description Protocol
SIP Session Initiation Protocol
TCP Transmission Control Protocol
TIPHON Telecommunications and Internet Protocol Harmonization Over
Networks
VoIP Voice over Internet Protocol
WAN Wide Area Network