GPON or FTTB: which line reaches your building, and the difference

GPON: fibre into the flat

The fibre comes into the flat and plugs into the terminal, the ONT. One fibre tree serves up to 32 flats and, under ITU-⁠T G.984, carries 2.488 Gbit/s down and 1.244 Gbit/s up in total. We load the trees so that a 1000 Mbit/s tariff runs at full speed in the evening too.

FTTB: fibre to the building, then copper

In some older blocks the fibre reaches a cabinet in the building, and copper network cable runs from there to the flat. That cable carries up to 100 Mbit/s, so the top tariff at an FTTB address is Internet 100. There is no terminal: the cable goes straight into the Wi-⁠Fi router, a TP-Link Archer AX23.

How much of each we have

As of 1 October 2026, 2,140 buildings have fibre into the flat and 610 older blocks run on FTTB. We move FTTB blocks to GPON every year: the address check shows the month a move is planned for.

How to tell at home

• A thin fibre cable comes to the wall and there is a terminal with PON and LOS lights: that is GPON.
• An ordinary network cable comes out of the wall straight into the router: that is FTTB.
• Simplest of all: pick the street and building in the address check.

When the building moves to GPON

The installer runs fibre into the flat and fits a terminal, which takes about an hour. The move is free and the tariff stays the same; if you like, you can switch to a faster tariff the same day.