Sitopu, Mutiara Widasari, et al. “Link Budget, SNR, and BER Analysis of a GPON-Based FTTH Network Using OptiSystem in Grand Taman Anggrek Residence Medan”. Journal of Computers and Digital Business, vol. 5, no. 3, Sept. 2026, pp. 435-40, doi:10.56427/jcbd.v5i3.1092.