10Gtek 2-Pair 1.25G SFP Bidi Transceiver for 1000Base-BIDI - Reliable

Our review of the 10Gtek 2-Pair 1.25G SFP Bidi Transceiver finds it aimed squarely at network engineers and small IT teams who need a dependable, plug-and-play way to extend Gigabit links over single-mode fiber. The biggest reason to buy is straightforward: it provides bidirectional 1000BASE-BIDI operation over a single LC connector for up to 20 km, which solves fiber count and cabling complexity without extra hardware. In short, this product is a practical, tested replacement or spare for switches from Cisco, Ubiquiti, Mikrotik and other open systems.

Key Features

• Bidirectional single LC: Delivers two wavelengths over a single LC connector so a single fiber can carry a full duplex Gigabit link, reducing cabling and port requirements.
• 20 km reach: Rated to run up to 20 km on single mode fiber, which covers most campus links and small carrier runs without repeaters.
• DDM support: Digital Diagnostic Monitoring provides real-time status for Tx/Rx power and other key parameters, helping diagnose fiber problems quickly.
• Wide compatibility: Built to work with Cisco GLC-BX-D, Ubiquiti UF-SM-1G-S, Mikrotik and similar open SFP ports for easy plug-and-play deployment.
• Factory tested: Each transceiver is individually tested in the vendor lab to ensure signal integrity, so units arrive ready for production use.
• Warranty and support: Backed by a 30 day free-return policy, a 3 year warranty and lifetime tech support for peace of mind after purchase.

Who It's For

This transceiver set is best for IT administrators, integrators and small service providers who need to extend Gigabit Ethernet over single-mode fiber while minimizing fiber pairs. It fits networks that use SFP ports on switches, routers and NICs and where compatibility with open vendor optics is required.

Those who should look elsewhere include users who need multimode support, higher than 1.25 Gbps data rates, or very long haul carrier optics beyond the 20 km rating. Also consider vendor-branded modules if you require certified optics from a specific switch vendor for strict warranty or support contracts.

Pros & Cons

Pros

• Reliable bidirectional operation over a single LC reduces cabling and fiber usage.
• DDM provides useful live diagnostics for easier troubleshooting.
• Wide interoperability with Cisco, Ubiquiti, Mikrotik and other open switches simplifies deployment.

Cons

• Designed for single mode 1000BASE-BIDI only, so it is not suitable for multimode links or speeds above 1.25 Gbps.

Specifications

Our Verdict

The 10Gtek 2-Pair 1.25G SFP Bidi Transceiver is a practical, cost-effective solution for extending Gigabit links over single-mode fiber when reducing fiber count matters. With reliable lab testing, DDM and broad compatibility, it is a good value for IT teams that need dependable, hot-pluggable optics for campus or small provider networks.

Frequently Asked Questions

Will these transceivers work with Ubiquiti UniFi switches?
Yes, customers report flawless compatibility with Ubiquiti UniFi models listed, and the modules are designed for open SFP ports.

How far can these modules transmit?
They are rated to reach up to 20 km over single mode fiber, suitable for campus and short carrier links.

Do these modules provide diagnostics?
Yes, the transceivers support Digital Diagnostic Monitoring so you can monitor Tx/Rx power and other key parameters in real time.