Naga Praneeth Yerram. “Understanding SIP and VoIP: Fundamental Technologies in Modern Communication Systems”. International Journal of Scientific Research in Computer Science, Engineering and Information Technology 10, no. 6 (November 20, 2024): 665–670. Accessed September 14, 2025. https://ijsrcseit.technoscienceacademy.com/index.php/home/article/view/CSEIT241061111.