Gigabit Passive Optical Network (GPON)
GPON is the widely used ITU-T standard for passive optical networks, delivering about 2.5 Gbit/s downstream and 1.25 Gbit/s upstream, shared between the users on each fibre.
What is Gigabit Passive Optical Network (GPON)?
GPON is defined in the ITU-T G.984 series and is the basis of most FTTP roll-outs, including Openreach's. It carries Ethernet and IP traffic efficiently and, through its encapsulation method, can also carry older traffic types. It supports triple-play services (voice, data and video) and a reach of up to around 20 km, with typical split ratios of 1:32 or 1:64. Its successors, XGS-PON and higher-speed PON standards, offer around 10 Gbit/s and more on the same fibre.