Design and implementation of a VoIP system for campus usage: A case study at NPRU

Voice over Internet Protocol (VoIP) technology has continually gained popularity and has been widely adopted for personal and enterprise usage over the past decade. This results from its capability of reducing the cost of a pricy phone bill while being able to increase the organization's productivity as a whole. The contribution of this work is to discuss the guidelines in designing and the implementation issues in deploying a VoIP system for campus usage. Specifically, this paper illustrates how VoIP is designed to be integrated with the existing analog phone system, in order to provide a solution to the problems of internal phone line shortage and frequently damage of an analog telephone card, at Nakhon Pathom Rajabhat University (NPRU). The system's performance is then evaluated in terms of voice quality and the sufficiency of the number of trunks required, which reveals that the designed system operates with satisfactory performance.