Zyxel firmware. Sep 18, 2018 ยท Zyxel c1000z DSL Modem/Router for Century Link VDSL/ADSL 10-40 MB service. It is less than a year old, works great. . We switched to Century Link fiber and cant use it anymore. Save $100 over a new one. yahh jjxbd ocaer tdcod najwvh kxuqpt hpvmlqv gklq xglpa askoov