Voice over Internet Protocol (VoIP) technology has revolutionized modern communication methods by offering cost-effective, scalable solutions for institutions, along with additional services such as auto-attendant and voicemail. This study presents the design and implementation of an internal communication system based on VoIP technology using the open-source Asterisk platform, aimed at upgrading and enhancing the internal telephony system at the College of Industrial Technology – Misrata. The research followed an applied methodology that included an assessment of the college’s infrastructure, analysis of office communication needs, design of the internal network, configuration of the Asterisk server, and its integration with user endpoints via Softphone applications. Field tests were conducted to evaluate system performance by initiating a series of internal calls, using Wireshark to measure average packet loss and latency. Test results showed that the system performed well, with most calls recording low latency (under 10 ms) and acceptable packet loss (under 5%), indicating stable voice quality. Only two calls experienced high latency and two showed higher-than-normal packet loss, suggesting temporary network issues. These results confirm the system’s efficiency and its applicability across various institutional settings................. Keywords: ............. VoIP, Asterisk, Packet Loss, Latency.