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junio 22, 2019

Specification Differences Among GPON, XG-PON and XGS-PON

What is GPON?
GPON stands for Gigabit Passive Optical Networks. GPON is a point-to-multipoint access mechanism. Its main characteristic is the use of passive splitters in the fiber distribution network, enabling one single feeding fiber from the provider’s central office to serve multiple homes and small businesses.

What Is XG(S)-PON?
XG(S)-PON is evolved from the existing GPON technology, the XG-PON is with the bandwidth of 10G for downstream and 2.5G for upstream, XGS-PON with the bandwidth of 10G for downstream and 10G for upstream. XGS-PON is a higher bandwidth, symmetric version of GPON. Again, the same capabilities of GPON and can co-exist on the same fiber with GPON.

Specification Differences Among GPON, XG-PON and XGS-PON

Specifications GPON 10G GPON
XG-PON XGS-PON
Network Structure
Wavelength Downstream: 1480 ~ 1500 nm

Upstream: 1290 ~ 1330 nm

Downstream: 1575 ~ 1580 nm

Upstream: 1260 ~ 1280 nm

Downstream: 1575 ~ 1580 nm

Upstream: 1260 ~ 1280 nm

Center wavelength Downstream: 1490 nm

Upstream: 1310 nm

Downstream: 1577 nm

Upstream: 1270 nm

Downstream: 1577 nm

Upstream: 1270 nm

Max. Line Rate Downstream: 2.488 Gbit/s

Upstream: 1.244 Gbit/s

Downstream: 9.953 Gbit/s

Upstream: 2.488 Gbit/s

Downstream: 9.953 Gbit/s

Upstream: 9.953 Gbit/s

Frame Structure GEM XGEM XGEM
Max. Physical Transmission Distance 60 km 100 km 100 km
Max. Split Ratio 1:128 1:256 1:256
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