for Extreme 1.25G BIDI SFP Module 10-20KM Compatible - Reliable Link

In this review the reviewer looks at a pair of 1.25G SFP BIDI transceivers compatible with Extreme 10056 and 10057 models, aimed at network engineers and IT teams needing a cost-effective bidirectional fiber link. The bottom line: these modules deliver a straightforward, carrier-class replacement for OEM optics, supporting up to 20km over a single LC simplex connection. The reviewer found them useful for extending existing fiber runs without recabling, with clear compatibility notes and factory testing that reduce deployment risk.

Key Features

• Compatibility: Works with Extreme 10056 and 10057 SFP slots and is stated to be compatible with Cisco gear, allowing easy swap-in replacements for common switches.
• Bidirectional Operation: Supports 1000BASE-BX-U and 1000BASE-BX-D to carry transmit and receive on a single fiber, saving cabling and port resources.
• Range: Rated for up to 20km over single-mode fiber which meets many campus and metro edge link requirements.
• Wavelength Pairing: Uses TX1310nm/RX1550nm for one direction and TX1550nm/RX1310nm for the opposite side, matching standard WDM pairing for simplex LC connectors.
• Quality Assurance: Each transceiver is tested individually and backed by CE and FCC compliance plus a three year replacement and lifetime warranty for peace of mind.

Who It's For

This product is best for network administrators who need a plug-and-play replacement for failed or missing SFP modules on Extreme 10056/10057 switches, or for teams seeking cost-effective WDM simplex links between buildings. The modules suit scenarios where conserving fiber strands and switch ports is important.

Those who should look elsewhere include users requiring multi-rate SFPs, active optical cable solutions, or links beyond single-mode 20km. If you need vendor-certified optics for a highly regulated procurement, check your policy before choosing third-party transceivers.

Pros & Cons

Pros

• Direct compatibility with Extreme 10056 and 10057 helps avoid configuration headaches when replacing optics.
• WDM BIDI design reduces fiber usage by carrying both directions on one LC simplex connection.
• Individual testing and a multi-year replacement warranty provide reliability and reduced deployment risk.

Cons

• Limited to 1.25Gbps and single-mode ranges up to 20km, so it is not suitable for higher-speed or longer-haul links.

Specifications

Form Factor	SFP Bidi Transceiver
Data Rate	1.25Gb/s
Connector	Single LC simplex
Wavelengths	Up TX1310nm / RX1550nm; Down TX1550nm / RX1310nm
Supported Standards	1000BASE-BX-U and 1000BASE-BX-D
Maximum Distance	Up to 20km
Warranty	3 year replacement and lifetime warranty

Our Verdict

These 1.25G SFP BIDI modules are a practical, cost-effective option for teams needing reliable simplex fiber links on Extreme 10056 and 10057 hardware. They offer solid compatibility, individual testing, and a reassuring warranty, making them good value when 1Gbps capacity and 20km range meet network requirements.

Frequently Asked Questions

Will these transceivers work in Cisco switches?
Yes, the product notes compatibility with Cisco and the modules are coded in a compatibility lab to meet many vendor requirements, but always test in your environment first.

Do I need two modules for a full duplex link?
Yes, a pair is required: one configured for the up direction and the other for the down direction to create a bidirectional link over a single fiber.

Are these new or refurbished units?
The modules are described as made from 100% new materials and individually tested before delivery.