> How does this work for FTTH? I know nothing about fibre optic networks. I had the impression that each subscriber has their own wavelength, or rather a range

> How does this work for FTTH? I know nothing about fibre optic networks. I had the impression that each subscriber has their own wavelength, or rather a range of wavelengths that captures their bandwidth, and that does not overlap with other subscribers. The keyword to search for is GPON. It's multiplexed, each subscriber receives a few time slots in a shared wavelength. The transmissions from the subscribers don't collide because their time slots don't overlap.