Compared with traditional Ethernet and Wi‑Fi-only campus networks, FTTR can significantly improve key performance indicators. Actual results depend on your selected OLT, FTTR ONT models, Wi‑Fi standards, and service provider configuration,

​FTTR (Fiber-To-The-Room) is an all-optical indoor networking architecture that extends fiber from the OLT or optical distribution point directly into each room, where an FTTR ONT or in-room gateway provides high-speed Wi‑Fi and wired access.

If the optical attenuation of the optical path between the ONT and the OLT is significantly greater than -25dB, it will cause the received optical power of the optical module of the ONT or OLT to be lower than the sensitivity of the receiver, thus preventing the optical module from working properly.

The ONU and OLT are connected via a 1:N optical splitter, with a maximum fiber optic transmission distance exceeding 20km. The PON ports of both the ONU and OLT are in ON state, but the ONU device is unable to register.

In PON networks, optical network layer faults mainly include fiber optic/cable line faults, OLT/ONU optical module faults, and abnormally emitting ONU faults.