C.GOMATHI, R. T. R. TRANSFERRING VOICE OVER LOCAL AREA NETWORK THROUGH INTERNET PROTOCOL-PRIVATE BRANCH EXCHANGE. International Journal of Engineering and Computer Science, india, v. 2, n. 04, 2017. Disponível em: http://ijecs.in/index.php/ijecs/article/view/577. Acesso em: 19 may. 2024.