Ramadhan, Bagoes, Muhamad Fatchan, and Elkin Rilvani. “Analisis Implementasi Media Komunikasi Berbasis IP Menggunakan Arterisk Freepbx”. Journal Automation Computer Information System 1, no. 1 (May 31, 2021): 19–25. Accessed April 18, 2024. https://jacis.pubmedia.id/index.php/jacis/article/view/3.