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What are 10G-GPON and 10G-EPON?

What are 10G-GPON and 10G-EPON? : Telecom network is moving very fast in providing convenience, Telecom sector is an area in which 20 years ahead planning is also done. Applications and services such as HD IPTV, video-on demand (VoD), voice over IP (VoIP), video conferencing, online gaming, and peer-to-peer (P2P) networking make networking so that new technologies can be applied by existing standards in the future It may be necessary to do.

Still NG-PON not fully familiar or commonly used, this article will briefly explain NG-PON (Next Generation Passive Optical Network), as they are very recent standards, even now are also  studied and very expensive, It is still believed that it will be applicable for future projects. In this article, specifically 10G-GPON and 10G-EPON will be explained.


10G-PON (XG PON) is a broadband transmission standard that can provide shared Internet speeds of 10 Gbps over passive optical networks and was approved in 2010. Nowadays it is meeting parts of this standard.

10G-GPON is the next generation 10 Gigabit standard that comes from GPON (Gigabit Capable PON) and enables its coexistence with installed devices of the same network. In addition, now we can say that 10G-GPON is an extension of the current GPON and the deployment can be reused.

See image below a typical 10G GPON fiber for home (FTTH) network. In 10G GPON, the downstream rate on fiber is 10 Gbps. Upstream can be 1.25 (current GPON upstream rate, not shown), 2.5 or 10 Gbps, and the higher the upstream rate, the higher the cost of optics in optical network terminals.

Current GPON networks use ONT optics transmitted at 1.25 Gbps upstream, and will be by far the cheapest option for a 10G GPON ONT transceiver, which is typically the most expensive component in ONT. 10G-GPON allows subscriptions in the upstream direction, and this eliminates the need for higher upstream rates.

Network Diagram of 10G-GPON

The number one electronic cost in a PON network is unsaturated ONTs, although the cost of installing fiber optics typically drives the full cost equation. There can easily be thousands of ONTs per single medium-sized OLT. An important element to maintain the cost of ONT down is an inexpensive optical transceiver, and 10G GPON transceivers that are capable of transmitting 10G upstream are significantly more expensive than 2.5G and 1.25G upstream capable transceivers.

However, with a lot of attention being paid to the upstream lately, the cost of ONT gets a lot of attention by carriers, so expect 10G GPON upstream rates at the lower end initially and significantly longer in FTTH networks.

Finally, this standard can be summarized in its two most common methods:
➤XG-PON1 (Asymmetric 10G-PON): 10 Gbps downstream and 2.5 Gbps upstream.
➤XG-PON2 (Symmetric 10G-PON): 10 Gbps downstream and upstream, but will require more expensive lasers to deliver upstream transmission speeds.


About 10G-EPON broadband transmission refers to the 10 Gigabit Ethernet passive optical network standard, unlike the 10G-PON, this standard was approved in September 2009. It emphasizes the coexistence of 1 Gbps and 10 Gbps EPON systems on the same network. The 10GEPON network is shown in the diagram below-


The downstream Ethernet frame and idle character are broadcast on the 10G EPON. Upstream uses Time Division Multiple Access (TDMA) with each ONT transmitted in its own time, which can vary in size over time to optimize upstream. Since burst transmissions from different ONTs can have different line rates (due to different bit rates between 1Gbps to 10Gbps), this method is called dual-rate TDMA.

In the downstream direction, the 1 Gbps and 10 Gbps channels have different wavelengths, with the 1 Gbps transmission limited to the 1480–1500 nm band and the 10 Gbps transmission 1575 to the 1580 nm band. 10G-EPON allows both upstream channels to share the same spectral area by low chromatic dispersion, but this requires 1 Gbps and 10 Gbps channels to be separated into time zones.

Similarly 10G-PON standard, this standard supports two configurations:
➤Asymmetric: Operating at 1 Gbps in the upstream direction and 10 Gbps in the downstream direction.
➤Symmetric: Operating at both upstream and downstream directions at 10 Gbps data rate. 

The asymmetric 10 / 1G EPON is less challenging then the symmetric option, as this specification relies on quite mature technology. The upstream transmission is similar to the existing 1G EPON and will rely on field-proven and extensively deployed burst-mode optical transverse. Downstream transmission, which uses continuous mode optics, will depend on the maturity of 10 Gbps point-to-point Ethernet devices.

Driver for 10 / 10G-EPON is necessary to provide sufficient downstream and upstream bandwidth to support the MDU. When the deployment strategy is MDU configuration, an EPON ONT can be added up to a thousand customers.

For the convenience of all of you, BPON, EPON and GPON can be condensed and completed in the following table:
xPON standards

Last Word

Dear friends, I have tried my best to give you complete information about 10G-GPON and 10G-EPON. Standards of BPON, EPON and GPON are also described by a table for easy understanding. I hope you will be satisfied with the information given in this article " What are 10G-GPON and 10G-EPON?". How did you like this article, comment me in the inbox and forward to your friends as well.

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