This is not a GPON device. The UISP-FIBER-XG uses an ITU-G.987 XG-PON WAN port, delivering a total non-blocking line rate of 9.95 Gbps downstream and 2.44 Gbps upstream — roughly 4× the downstream capacity of standard GPON (which tops out at 2.488 Gbps). XG-PON is the next-generation asymmetric PON standard, suited to high-density ISP deployments where GPON bandwidth is being exhausted, or to commercial and enterprise premises where a single subscriber genuinely needs multi-gigabit throughput.

The SC/APC WAN port operates at TX 1270 nm / RX 1577 nm with a normal TX range of 2 to 7 dBm and RX range of −9 to −27 dBm, using scrambled NRZ line coding, at a maximum physical reach of 20 km.

2.5 GbE LAN — No Bottleneck at the Premises

The LAN port is a 100/1000/2500 MbE auto-negotiating RJ45, meaning the XG-PON’s substantial downstream capacity can actually flow through to your downstream router or switch — provided that equipment also has a 2.5 GbE port. A 1 GbE LAN port would cap the link at one-tenth of what the PON connection can carry; Ubiquiti have avoided that here.

Designed for the UISP-FIBER-OLT-XGS — and Only That

The UISP-FIBER-XG is only compatible with the UISP Fiber OLT XGS (UISP-FIBER-OLT-XGS) and cannot be used with third-party OLTs. This is a firm Ubiquiti ecosystem constraint. The OLT-XGS supports XGS-PON, XG-PON, and GPON ports simultaneously, so existing GPON CPE (WaveFiber ONU, UF-WiFi6) can coexist on the same OLT while select premises are upgraded to XG-PON with the Fiber XG.

XG-PON only — not GPON. This unit requires an XG-PON port on the OLT. It will not register on a GPON-only OLT such as the UF-OLT or UF-OLT-4. Confirm your OLT supports XG-PON before purchasing.

Optical Signal LEDs

The three-LED PON signal indicator follows the same pattern as other UISP fibre CPE: all off during bootup; 1× orange for signal too low (below −27 dBm); 1× white for low signal (≥ −27 dBm); 2× white for good (≥ −24 dBm); 3× white for strong (≥ −12 dBm); 1× orange + 2× white for too strong (≥ −9 dBm); 3× orange for no signal.

Power, Form Factor, and Compliance

The unit measures 100 × 100 × 27 mm and weighs 220 g, housed in UV-stabilised polycarbonate. Power is via USB-C 5V/3A (included adapter) or 24V passive PoE (2-pair, pins 4/5+; 7/8−, 10–30V DC range). Maximum power consumption is 6W. Memory is 256 MB DDR with 32 MB NOR flash. The device is NDAA compliant and certified CE, FCC, and IC.

Key Highlights

• PON standard: XG-PON (ITU-G.987) — not GPON
• PON port: 1× SC/APC | TX 1270 nm / RX 1577 nm | Max reach: 20 km
• Downstream: 9.95 Gbps | Upstream: 2.44 Gbps
• LAN port: 1× 100/1000/2500 MbE RJ45 (auto-negotiating)
• OLT compatibility: UISP-FIBER-OLT-XGS only (Ubiquiti)
• Management: UISP platform, Ethernet in-band, OMCI-style PON management
• Signal LEDs: 3-LED optical signal strength indicator
• Memory: 256 MB DDR | 32 MB NOR flash
• Power: USB-C 5V/3A (included) or 24V passive PoE | Max 6W
• Dimensions: 100 × 100 × 27 mm | Weight: 220 g
• Operating temp: −15°C to 45°C | Humidity: 10–95% non-condensing
• NDAA Compliant: Yes
• Certifications: CE, FCC, IC

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