3.
Internet telephony uses the Internet protocol to send
audio, video an data between two or more users in
the real time.
IP telephony is the integration of voice and data
networks, services, and applications.
The main motivation of development of IP
Telephony is the cost saving & integrating new
services.
IP Telephony
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4.
Vocaltec introduced the first Internet telephony
software product in early 1995. Running a
multimedia PC, the Vocaltec Internet Phone.
In 1996, Vocaltec with an Intel Company announced
to produce the first IP telephony gateway.
IP Telephony
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10.
The H.323 standard for the transmission of real-time
audio, video, and data communications over packetbased networks based on IP telephony.
H.323 is a standard produced by the ITU-T Study
Group 16.
Currently the most widely-supported IP telephony
signaling protocol.
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12.
Terminals :
H.323 terminal can either be a personal
computer or a stand-alone device, running
an H.323 and the multimedia applications.
Gateways :
An H.323 gateway provides connectivity
between an H.323 network and a nonH.323 network.
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14.
MCUs provide support for conferences of three or
more H.323 terminals. All terminals participating in
the conference establish a connection with the MCU.
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19.
Internet telephony is cost savings and integrating
new services.
Internet Telephony is a powerful and economical
communication options by combination of the
telephone networks and data networks.
Many public telecommunication operators are
establishing their own IP telephony services, and
using IP-based networks as alternative transmission
platforms.
IP Telephony
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