SFP BIDI Transceiver 1.25G 10-20km for Allied AT-SPBD10 Series

In this review we look at the Jeirdus SFP module designed as a direct replacement for Allied AT-SPBD10-13 and AT-SPBD10-14. The bottom line: network engineers and IT teams who need a reliable, carrier-class bidirectional SFP for singlefiber links will appreciate its compatibility and tested performance. Our review found the module is straightforward to deploy, supports 1000BASE-BX-U and 1000BASE-BX-D operation, and delivers up to 20km reach over a single LC simplex connector, making it a practical, lower-cost alternative to vendor originals.

Key Features

• Compatibility: Built to work with Allied AT-SPBD10-13 and AT-SPBD10-14 modules so replacements can be swapped without reconfiguring switch optics.
• Bidirectional 1.25Gb/s: Supports 1000BASE-BX-U and 1000BASE-BX-D standards to carry gigabit traffic over a single fiber using WDM.
• Single LC Simplex: Uses a single LC connector and WDM wavelengths for easier cable management and reduced fiber count in long runs.
• Up to 20km reach: Rated for links to 20km, covering most campus and metro edge connections without intermediate repeaters.
• Vendor coding tested: Jeirdus compatibility lab verifies coding for multiple brands, including Cisco, reducing interoperability surprises.
• Quality and support: Constructed from 100% new materials and shipped after individual testing, with CE and FCC compliance plus a 3 year replacement and lifetime warranty.

Who It's For

This module is aimed at network administrators, system integrators, and small to medium IT departments that need a cost-effective replacement for Allied AT-SPBD10 series optics or require additional spare modules for field deployments. Its support for 1.25Gb/s bidirectional operation and single LC makes it a sensible choice for point-to-point fiber links, campus backbones, and branch interconnects.

Those who should look elsewhere include teams that require multimode optics, different form factors, or transmission beyond 20km, and environments that mandate specific vendor-signed optics for strict procurement rules.

Pros & Cons

Pros

• Proven compatibility with Allied AT-SPBD10-13 and AT-SPBD10-14 for drop-in replacement.
• Supports standard 1000BASE-BX-U and 1000BASE-BX-D bidirectional protocols for single-fiber links.
• Individually tested and backed by CE, FCC compliance and a 3 year replacement plus lifetime warranty.
• Compact single LC simplex connector reduces fiber cabling complexity.

Cons

• Limited to single-fiber WDM and up to 20km, so it is not suitable for longer-haul or multimode runs.

Specifications

Form Factor	SFP (1.25Gb/s)
Compatibility	Allied AT-SPBD10-13 and AT-SPBD10-14
Standards	1000BASE-BX-U and 1000BASE-BX-D
Connector	Single LC simplex
Wavelength	Up: TX1310nm / RX1490nm; Down: TX1490nm / RX1310nm
Range	Up to 20km
Certifications	CE, FCC

Our Verdict

The Jeirdus SFP BIDI transceiver is a pragmatic, cost-conscious replacement for Allied AT-SPBD10 series modules, offering tested compatibility, single-fiber convenience, and carrier-class build quality. For networking teams needing reliable 1.25Gb/s bidirectional links up to 20km, it represents good value given the individual testing and warranty support, but it is not intended for longer-haul or multimode scenarios.

Frequently Asked Questions

Will this module work in Cisco switches?
Yes. Jeirdus states the module is compatible with Cisco and other brands after compatibility lab testing and coding verification.

What connector and wavelengths does it use?
The transceiver uses a single LC simplex connector and WDM wavelengths: TX1310nm/RX1490nm for one direction and TX1490nm/RX1310nm for the opposite.

How long is the warranty?
Jeirdus provides a 3 year replacement policy plus a lifetime warranty on materials and build quality.