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Specification Differences Among GPON, XG-PON and
XGS-PON
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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
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Network Structure
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Wavelength
Downstream: 1480 ～
1500 nm
Downstream: 1575 ～
1580 nm
Downstream: 1575 ～
1580 nm
Upstream: 1290 ～ 1330 Upstream: 1260 ～ 1280 Upstream: 1260 ～ 1280
nm
nm
nm
Center wavelength Downstream: 1490 nm
Upstream: 1310 nm
Max. Line Rate
Downstream: 1577 nm
Downstream: 1577 nm
Upstream: 1270 nm
Upstream: 1270 nm
Downstream: 2.488 Gbit/s Downstream: 9.953 Gbit/s Downstream: 9.953 Gbit/s
Upstream: 1.244 Gbit/s
Upstream: 2.488 Gbit/s
Upstream: 9.953 Gbit/s
Frame Structure
GEM
XGEM
XGEM
Max. Physical
Transmission
Distance
60 km
100 km
Max. Split Ratio
1:128

100 km
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PON-BASED GPON ARCHITECTURES INTRODUCTIONS (http://www.tarluz.com/ftth/pon-based-gponarchitectures-introductions/)
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PON architectures for FTTH deployments are currently based on passive optical splitters to distribute the
bandwidth to each customer using fiber splitters providing ratios ranging up to 1:64 or even 1:128. The
physical PON FTTH architecture typically supports the Ethernet protocol. PON network feeds a variety of 1
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optical
network
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GPON & GEPON Comparison table
(http://www.tarluz.com/ftth/gpon-gepon-comparison-table/)
GPON GEPON COMPREHENSIVE COMPARISON TABLE Comparison
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GPON GEPON GPON GEPON Basics ITU Standard G.984 ITU
Standard G.987 for 10Gbits Downstream 10Gbits/s, Upstream
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2.488/10Gbits/s Uses GPON Encapsulation Method (GEM),
fragmented packets or ATM (most implementations use GEM as ATM
is expensive) Sometimes called GEPON (Gigabit Ethernet Passive
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(http://www.tarluz.com/ftth/gponOptical Network) IEEE 802.3 standard,…
gepon-comparison-table/)
Optical fibre technologies (http://www.tarluz.com/ftth/optical-fibretechnologies/)
Optical fibre has incredibly low loss coupled with extremely high
capacity, making it a unique transmission medium. From the point of
view of the access network The Shannon Limit can effectively be
ignored. Distance is not an inherent limitation as optical signals can
travel 70–80 km before they need to…
(http://www.tarluz.com/ftth/opticalfibre-technologies/)
(http://www.tarluz.com/ftth/ponpassive-optical-networkspassive-optische-netze/)
PON - Passive Optical Networks / Passive optische Netze
(http://www.tarluz.com/ftth/pon-passive-optical-networks-passiveoptische-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.…

(http://www.tarluz.com/ftth/acloser-look-at-commonly-usedpon-technologies/)
passive optical network) 1G / 10G…
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A closer look at commonly used PON technologies
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PON technology,
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the Institute of Electrical and Electronics Engineers (IEEE) and the
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