Related terms:
sip
alg
rtp
qos
pbx
nat
pstn
udp
voip
isdn
xmpp
stun
ietf
skype
codecs
dialing
packets
gateway
telephony
conferencing
voice over ip
connectivity
interconnection
transport layer
circuit switched
instant messenger
internet protocol
service provider
instant messaging
ip multimedia subsystem
Wikipedia sources:
Session Initiation Protocol
IP Multimedia Subsystem
H.323
IP Phone
Mobile VoIP
Voice over Internet Protocol
Application-level gateway
Comparison of VoIP software
Private branch exchange
Network address translation
Microsoft Office Communications Server
Context for words:
session
initiation
protocol
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