ABSTRACT

Hasanuddin Sirait, A Transmission Control Protocol/Internet Protocol-(TCP/IP)-based Voice Conference System (VCS) (supervised by Zulfajri B. Hasanuddin and  Rhiza S. Sadjad).

This is a design project to build a Voice Conference System (VCS) utilizing the features of a typical TCP/IP computer network. The application software package is developed using an object-oriented programming language Visual-C++. 

The heart of the system is the iLBC (internet low bit rate codec), a signal coding and decoding system supported by the extended-DSK for conference system applications, according to the ITU 323.h standard protocol. The network architecture is a client-server computer network consisting of the conference initiator as the server and the conference participants as the clients. One of the communication ports at the server computer is assigned as the data buffer of all signals involved in the conference.

It is observed that the iLBC system encodes the voice digital signals into 50 Byte data packages. The time to read and write the data package into the memory system is 0.003 seconds per package in average, therefore the VCS consumes a bandwidth of 36.65 Kbps per participating-client in the network. The number of participating clients in the VCS is limited by the bandwidth.