Can XGS-PON coexist with GPON?

Yes. XGS-PON uses 1577nm/1270nm wavelengths, which are distinct from GPON's 1490nm/1310nm. This allows both services to run on the same fiber using a coexistence element.

What split ratio does XGS-PON support?

XGS-PON typically supports split ratios of 1:64 (N1 Class) or 1:128 (N2 Class), similar to GPON but with much higher bandwidth capacity.

XGS-PON Optical Transceivers (OLT & ONU)

Q: What is the difference between XG-PON and XGS-PON?

The main difference is upload speed. XG-PON provides 2.5 Gbps upstream, whereas XGS-PON provides 10 Gbps upstream (Symmetric 10G).

Maximize your network potential with our premium range of XGS-PON (10-Gigabit-capable Symmetric Passive Optical Network) transceivers. Compliant with the ITU-T G.9807.1 standard, these modules provide symmetric 10 Gbps Downstream and 10 Gbps Upstream bandwidth, offering the ultimate performance for enterprise, mobile backhaul, and high-tier residential services.

Our XGS-PON portfolio features high-quality OLT modules in SFP+ and XFP form factors for the Central Office, and ONU/ONT modules for the subscriber side. Engineered for versatility, they support coexistence with legacy GPON and 1G EPON networks.

The XGS-PON Difference: Symmetric 10G

While XG-PON is limited to 2.5G upstream, XGS-PON unlocks the full potential of fiber by delivering 10G in both directions. This symmetry is critical for modern applications like cloud computing, 4K/8K video conferencing, and 5G small cell backhaul.

Downstream: 9.953 Gbps (1577nm)
Upstream: 9.953 Gbps (1270nm)

Product Range Overview

1. XGS-PON OLT Modules

The OLT acts as the service provider endpoint. We offer solutions for all major equipment vendors:

XGS-PON OLT SFP+: The standard high-density form factor. Supports N1 (29dB) and N2 (31dB) optical budgets.
XGS-PON OLT XFP: Designed for platforms requiring the XFP mechanical standard.
Combo PON OLT (SFP+): (Advanced) A dual-channel module that transmits both GPON and XGS-PON signals simultaneously from a single port, simplifying migration.

2. XGS-PON ONU Modules

Installed at the customer premises, these SFP+ modules feature burst-mode transmission at 1270nm and continuous reception at 1577nm, enabling symmetric 10G connectivity.

Optical Power Classes (N1 & N2)

XGS-PON utilizes specific power classes to define the link budget and reachable distance/split ratio:

Class	Min Optical Budget	Typical Split Ratio	Reach
N1 Class	29 dB	1:64	20km
N2 Class	31 dB	1:128	20km
E1 Class	33 dB	1:256	Extended Reach

Coexistence and Migration

One of the key benefits of XGS-PON is its ability to coexist with current GPON deployments.

GPON: 1490nm (Down) / 1310nm (Up)

XGS-PON: 1577nm (Down) / 1270nm (Up)

Since the wavelengths do not overlap, service providers can operate both networks on the same fiber strand using WDM coexistence elements, upgrading individual users to 10G without disrupting existing 1G subscribers.

Frequently Asked Questions

1. What is the difference between XG-PON and XGS-PON?

The “S” in XGS-PON stands for Symmetric. XG-PON offers 10G download but only 2.5G upload. XGS-PON offers 10G download AND 10G upload.

2. Are XGS-PON modules compatible with SFP+ Ethernet switches?

No. While they use the SFP+ mechanical package, XGS-PON modules use specific PON framing and timing protocols (ITU-T G.9807.1). They require a compatible OLT (for OLT modules) or ONU/ONT device (for ONU modules) and will not work in a standard Ethernet switch port.

3. Can XGS-PON coexist with 10G EPON?

Generally, no. 10G EPON uses slightly different wavelengths (often overlapping) and different protocols (IEEE vs ITU-T). They are competing standards and typically do not share the same ODN.