Nasron, Nasron, Martinus Mujur Rose, and Darin Fadhilah. “Pengembangan Server VOIP Menggunakan FREEPBX Dan Asterisk Berbasis Raspberry PI”. Protek : Jurnal Ilmiah Teknik Elektro 8, no. 1 (May 5, 2021): 22–25. Accessed May 30, 2026. https://ejournal.unkhair.ac.id/index.php/protk/article/view/2222.