The Session Initiation Protocol (SIP) is a standard protocol for establishing, manipulating, and tearing down an interactive user session that involves multimedia elements such as audio, video, instant messaging, or other real-time data communications. The embedded SIP phone can be beneficial for frequent computer users with larger telephone usage, such as people working in global branch offices of enterprises, schools on the academic communication backbone, or research institutes among Universities on an academic broadband infrastructure. The SIP phone which is developed by using GID accelerates business performance by automating and orchestrating processes across total enterprises. Enterprise users can collaborate more flexibly and cost-effectively with business and trading partners. Maximum number of concurrent calls that can be made in the SIP are 255. This SIP phone is scalable, extensible, and fits comfortably into different architectures and deployment scenarios.