16-10-2010, 07:27 PM
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Global Telephony
Guided By: Presented By: Prof. S.K.Ghosh Nitesh Jain
05IT6008
SCHOOL of INFORMATION TECHNOLOGY
INDIAN INSTITUTE of TECHNOLOGY KHARAGPUR
KHARAGPUR
Introduction:
Today Global Telephony is a very powerful and economical communication options.
Global telephony is the integration and convergence of voice and data networks, services, and applications. Internet telephony uses the Internet to send audio, video and data between two or more users in the real time.
Internet Engineering Task Force (IETF) defines the global telephony is the exchange of information primarily in the form of speech that utilizes a mechanism known as Internet Protocol.
ITU-T Study-Group 2 (SG2) issued the following explanations of the term IP telephony: "IP is an abbreviation for Internet Protocol. It is a communications protocol developed to support a packet-switched network.
The main motivation of development of IP Telephony is the cost saving & integrating new services. Internet telephony integrates a variety of services
Vocaltec introduced the first Internet telephony software product in early 1995, running a multimedia PC, the Vocaltec Internet Phone. In 1996, Vocaltec announced it was working with an Intel Company (Dialogic Corporation, an Intel acquisition made in 1999) to produce the first IP telephony gateway. The technology has improved to that point where conversations are easily possible. Gateways are the key to bringing IP telephony into the mainstream. By bridging the traditional circuit-switched telephony world with the Internet. Internet telephony technology has caught the world's attention.
