Seminar Topic : IP Telephony

. Tuesday, 26 April 2011

Introduction:
The six-stage evolution of IP telephony started in 1995. In stage one, the IP Telephony industry introduced personal computer (PC) software that allowed users to make telephone calls over the Internet. Both ends of the connection needed the same software. It was an economical way to make long-distance international calls.The cost was several hundred dollars up front but allowed unlimited free telephone calls over the Internet. Stage two allowed phone calls over the local enterprise companies' intranet network. Stage three connected intranets to the Internet for low-cost voice-over IP (VoIP) between enterprise intranet networks. In 1998, we also began to see common nomenclature as well as interoperable standard products.The media gateway (MG) and media gateway controller (MGC) were introduced as IP elements that we considered separate from the underlying PSTN.

 
Difficulty : Medium


Download Link : IP Telephony


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