As companies grow and expand their call centers, business managers will often hear the terms Session Initiation Protocol (SIP) and Voice over Internet Protocol (VoIP) used frequently when they are discussing their phone services. While the technologies are related, they are also distinct in their function and purpose. To understand their differences, it’s important to understand how they work in modern telecommunications systems. This article will define both SIP and VoIP, compare their functionalities, discuss…
Last Updated on February 18, 2026
