The customer had just upgraded from FTTB to full-fibre FTTP with Optus — objectively a better connection. Yet the moment the upgrade went live, the home's multi-AP UniFi wireless system stopped working entirely, leaving the whole house without usable WiFi.
客户刚把家里的宽带从FTTB升级到全光纤FTTP（Optus），线路本身明明变好了——结果升级一生效，家里的UniFi多AP无线系统整个罢工，全屋WiFi直接不可用。
The FTTP service itself had activated successfully, and Optus had supplied a new router as part of the upgrade. The failure was a chain of three separate issues stacked on top of each other:
- The new Optus router's settings hadn't been adjusted for the upgraded service, so the router itself couldn't get online.
- The physical cabling had been reconnected incorrectly during the changeover, cutting the UniFi APs off from the network.
- Even after the APs were reachable again, speed tests stayed well below what the line could do — the UniFi wireless config had the channel width set far too low, throttling wireless throughput across the house.
FTTP线路本身已成功开通，Optus也随升级换了一台新路由器。真正的故障是三个独立问题叠在一起：
- 新Optus路由器的配置没有按升级后的线路调整，路由器自己就联不上网。
- 切换过程中物理布线接错了，UniFi AP被整体断在网络之外。
- AP恢复联网后测速仍然明显偏低——UniFi的无线配置里信道频宽设得太低，把全屋的无线吞吐量死死压住。
An NBN technology upgrade (FTTB/FTTN/HFC to FTTP) changes how your home connects — but it doesn't reconfigure your own equipment. If you run anything beyond the ISP's router (UniFi, mesh, managed switches), budget for a proper reconfiguration after the upgrade, or a faster line can paradoxically leave you with slower — or zero — WiFi.
NBN技术升级（FTTB/FTTN/HFC升到FTTP）改变的是入户方式，但不会替你重新配置自己的设备。如果家里用的不只是运营商路由器（比如UniFi、Mesh、网管交换机），升级后一定要预留一次正规的重新配置——否则线路更快了，WiFi反而可能更慢，甚至直接瘫痪。
Result最终结果
FTTP online, all UniFi APs adopted and green, full-speed wireless with seamless roaming across the house.
FTTP恢复正常，全部UniFi AP成功上线，无线测速回到应有水平，全屋无缝漫游。