UFiber UF-SM-1G-S Single-Mode BiDi 1G Module 2-Pack - Reliable 3KM

Our review of the UFiber UF-SM-1G-S 2-pack finds a straightforward, purpose-built transceiver aimed at network installers and small to medium businesses that need reliable fiber uplinks without complexity. The biggest reason to buy is its simple, predictable performance: these are single-mode BiDi modules rated for 1G throughput and up to 3KM distance, supplied in a two-pack so a pair of devices is ready to link right away. For those seeking a hardy, industrial-temperature module for point-to-point fiber where managed features are unnecessary, this product gets the core job done.

Key Features

• 2-Pack Included: Shipping two transceivers lets an installer provision both ends of a link immediately without sourcing a matching partner.
• BiDi Wavelengths: Uses 1550nm-TX/1310nm-RX and 1310nm-TX/1550nm-RX to provide a single-pair fiber connection without running two strands.
• 1 Gigabit Speed: Supports up to 1000Mbps for standard gigabit Ethernet links common in access and aggregation layers.
• 3KM Range: Rated for up to 3 kilometers on single-mode fiber, which covers many campus and short metropolitan links.
• Industrial Temperature: Operates from -40 to 85 degrees C, making it suited for harsh environments or outdoor enclosures.

Who It's For

This module is for network technicians, small IT teams, and systems integrators who need a low-cost, reliable single-mode BiDi solution for connecting switches, ONTs, or fiber media converters over a single strand. The included pair is convenient when deploying new links or replacing failed modules without matching wavelengths manually.

Those who need multi-gig speeds, extended-distance long-haul fiber, or advanced diagnostic features built into optics should look elsewhere; this product focuses on basic 1G connectivity and environmental resilience rather than management or higher bandwidths.

Pros & Cons

Pros

• Includes two matched transceivers so a full link can be deployed immediately.
• BiDi operation saves fiber infrastructure by using one strand for both directions.
• Industrial temperature rating provides resilient operation in outdoor or unconditioned spaces.
• Simple 1G support aligns with common access network needs without extra configuration.

Cons

• Limited to 1G and 3KM, so it is not suitable for higher-throughput or longer-distance applications.
• No advanced management or diagnostics on the modules themselves, so link troubleshooting relies on host equipment.

Specifications

Package	2-Pack (two transceivers)
Wavelength	1550nm-TX/1310nm-RX and 1310nm-TX/1550nm-RX (BiDi, single-mode)
Max Data Rate	1000Mbps (1G)
Max Cable Distance	3KM
Operating Temperature	-40 to 85 degrees C (-40 to 185 degrees F)

Our Verdict

For installers who need an uncomplicated, durable single-mode BiDi solution, this 2-pack offers clear value: matched modules, single-strand operation, and an industrial temperature range make deployment quick and reliable. It is not for higher-speed or long-haul projects, but as a 1G link solution over up to 3KM it is practical, cost-effective, and built to handle harsh environments.

Frequently Asked Questions

Do these modules require two fibers or one?
They are BiDi single-mode modules designed to operate over one fiber by using opposite transmit and receive wavelengths on each end.

Are these suitable for outdoor enclosures?
Yes; the industrial temperature range of -40 to 85 degrees C supports operation in outdoor or unconditioned enclosures.

Will they support faster than 1G speeds?
No; these transceivers are specified for up to 1000Mbps and are intended for gigabit links only.