Anggraini, Dyah. “Analisis FXS (Foreign Exchange Subscriber) Port Pada IPPBX (Internet Protocol Private Branch Exchange)”. Journal of Telecommunication Network (Jurnal Jaringan Telekomunikasi) 10, no. 1 (March 12, 2020): 26-30. Accessed November 23, 2024. https://jartel.polinema.ac.id/index.php/jartel/article/view/163.