VoIP By Godson Gera

Introduction Basic electronic communication system History of electronic communication Introduction to VoIP Benefits of VoIP Detailed description of VoIP

Basic electronic communication system Source Information TransmitterReceiverDestination Information Transmission medium

History of Electronic Communication Samuel Morse developed the first electronics communication system which uses dots, dashes, and spaces generated through electromagnetic induction Alexander Graham Bell and Thomas A. Watson were the first to successfully transfer human conversation over a crude metallic-wire communications system they called the Telephone (this is the focus of my project) Guglielmo Marconi successfully transmitted the first wireless radio signals through earth’s atmosphere Commercial radio began.

Introduction to VoIP Traditional Telephone system

VoIP Telephone system

Full blown IP Telephony Solution

Benefits of using VoIP Reduced call cost Free soft phone to soft phone calling

Detailed Description of VoIP The conversion of the analog voice into IP packets, using a digital signal processor (DSP) embedded in the phone or using a PC in case of soft phones, which are software programs used with a hand set or headset connected to a PC Transmitting IP packets over a packet or data network (where the packets travel along with other VoIP packets, data packets, Video over IP packets, etc.), which are sent to appropriate destinations by routers and switches Conversion of IP packets back to voice (using DSP or computers).

Crescendo

System Architecture and Description Overview of modules Structure and Relationship User Interface issues

The first module is the one running on the client side “Client Module” The other running at the server side “Server Module”

Client Module This module will be concerned with the following work load The registration of the user onto the system Un-registering the user out from the system Transportation of voice packets

Server Module This module will undertake the following work Processing the requests of the user Maintaining records of the registered users

The Structure & Relationship between Modules Client ModuleLocation Server Module Session ModuleAudio Module CODEC Module Request processing Module User Information maintenance Transportation Reception Module

Working Relationship of modules AudioCODEC Transport Session Audio Transport Session CODEC Location Server Local Client (Bob) Remote Client (Alice) Request Processing User Information Maintenance

Main GUI of the Crescendo

Conclusion

Advantages of VoIP Cost reduction on long distance calls. Integration of voice and data networks. Bandwidth optimization. Long term equipment cost reduction because of the single physical. Single network also leads to decrement in maintenance and support costs. This product provides many services on single platform

Downsides of VoIP Jitter Echo

Scope for future work The peer to peer audio transmission can be extended to setup a conference. Along with audio transmission, video transmission can also be enabled. Call waiting, call forwarding, and voice mailbox.

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