Compatible with Cisco GLC-BX-D Bi-Directional SFP Transceiver

In this review the HPC Optics compatible GLC-BX-D Bi-Directional SFP transceiver is assessed for network engineers and IT teams needing a drop-in alternate to Cisco modules. The bottom line: this module delivers 1.25Gb/s 1000BASE-BX-D performance over singlemode fiber to 10km with the convenience of a simplex LC connector and bi-directional wavelengths, making it a practical, cost-effective choice for point-to-point Gigabit links where vendor compatibility and longevity matter.

Key Features

• Fully compatible with Cisco GLC-BX-D: Lets teams swap modules without reconfiguring existing hardware or worrying about vendor lock-in.
• Bi-directional SFP transceiver: Uses separate transmit and receive wavelengths on a single fiber to reduce cabling and simplify installations.
• 1.25Gb/s data rate: Supports standard Gigabit Ethernet throughput for access and edge links in enterprise networks.
• Up to 10km reach: Provides sufficient singlemode span for many campus, metro and inter-building connections without repeaters.
• Simplex LC connector with Tx 1490nm / Rx 1310nm: Matches typical BIDI fiber polarity and connector expectations for easy integration.
• Lifetime warranty: Offers long-term peace of mind for production deployments where continuous uptime is important.

Who It's For

This transceiver is aimed at network administrators, integrators and small to medium enterprise IT teams who need a cost-conscious, compatible alternative to first-party modules for 1000BASE-BX-D links. It fits well in scenarios where singlemode fiber runs are already in place and the goal is to preserve existing fiber while reducing inventory of different transceiver types.

It is not intended for use where vendor certification is required by contract, or in environments needing multi-gigabit speeds beyond 1G. Buyers requiring built-in diagnostic features beyond standard SFF-8472 monitoring should verify platform support before purchase.

Pros & Cons

Pros

• Direct compatibility with GLC-BX-D form factor makes replacement quick and low-risk.
• Bi-directional operation on a single fiber reduces cabling costs and simplifies runs.
• 10km singlemode reach covers the majority of campus and inter-building links.
• Lifetime warranty adds confidence for long-term deployments.

Cons

• Limited to 1.25Gb/s so it will not meet multi-gigabit aggregation needs.
• Advanced vendor-specific telemetry or guaranteed certification requirements may not be satisfied in some vendor-controlled environments.

Specifications

Product	Compatible GLC-BX-D Bi-Directional SFP
Standard	1000BASE-BX-D (BIDI) Gigabit Ethernet
Data Rate	1.25Gb/s
Fiber Type	Singlemode (SMF)
Wavelength	Tx 1490nm / Rx 1310nm
Maximum Reach	Up to 10km
Connector	Simplex LC
Warranty	Lifetime warranty

Our Verdict

For teams that need a straightforward, compatible GLC-BX-D replacement, this HPC Optics SFP provides dependable Gigabit BIDI links to 10km at a reasonable cost and with a reassuring lifetime warranty. It is good value for standard singlemode runs where 1G performance is sufficient and rapid hardware swaps are required.

Frequently Asked Questions

Will this work in Cisco gear?
Yes, it is designed to be fully compatible with the Cisco GLC-BX-D form factor and basic interoperability on supported equipment is expected.

What fiber and connector does it use?
It uses singlemode fiber with a simplex LC connector, employing 1490nm transmit and 1310nm receive wavelengths for bi-directional operation.

How far can this transceiver reach?
The module supports links up to 10km over singlemode fiber under normal conditions.