Riki, Riki, Aditiya Hermawan, and Yusuf Kurnia. “Voice Over Internet Protocol Based Communication Design (VoIP) With 3CXSystemPhone On Android Smartphone”. bit-Tech : Binary Digital - Technology 1, no. 1 (September 19, 2018): 1–8. Accessed April 24, 2024. https://jurnal.kdi.or.id/index.php/bt/article/view/2.