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.

Specifications	GPON	10G GPON
Specifications	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

PON-BASED GPON ARCHITECTURES INTRODUCTIONS
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GPON & GEPON Comparison table
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Optical fibre technologies
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PON - Passive Optical Networks / Passive optische Netze
Ein passives optisches Netz ist ein Glasfasernetz, welches zur Signalverteilung ohne aktive Komponenten auskommt. Es arbeitet mit optischen Splittern, die über keine elektrischen Vermittlungsfunktionen verfügen. Passive optische Netze sind im Bereich zwischen Vermittlungsstelle und Teilnehmeranschluss für Gigabit-Glasfaseranschlüsse installiert. Sie funktionieren als Zugangsnetze für die Teilnehmer zum weltweiten Daten- und Kommunikationsnetz.…
A closer look at commonly used PON technologies
There are two major standards groups for PON technology, they are the Institute of Electrical and Electronics Engineers (IEEE) and the Telecommunication Standardization Sector of the International Telecommunication Union (ITU-T). The following article is about the introduction of different PON technology. GEPON (Gigabit Ethernet passive optical network) 1G / 10G…

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