
● Introduction
The SFP-10G-LRM optical transceiver—short for 10 Gigabit Ethernet, Multi-Mode—is designed for 10 Gbps transmission over older or installed multimode fibers. It bridges the gap between short-range modules and longer, single-mode solutions, offering a cost-effective upgrade path for existing networks.
● What Makes SFP-10G-LRM Special?
Standard Compliance: Defined in the IEEE 802.3aq (2006) amendment for 10GBASE-LRM.
Fiber Compatibility: Works over FDDI-grade, OM1, OM2, and OM3 fibers—up to 220 meters reach.
Technology: Operates at 1310 nm and uses Electronic Dispersion Compensation (EDC) to overcome modal distortion.
Single-mode Support (non-standard): Some modules extend reach up to 300 m on SMF (G.652), though this isn’t IEEE-defined.
● Why Choose SFP-10G-LRM?
Upgrade without replacing infrastructure: Enables 10G performance on existing multimode fiber cabling (OM1–OM3), ideal for retrofits.
Economic and practical: More affordable than single-mode solutions and avoids fiber re-cabling.
Reliable design: Supports at least 99% link coverage for typical installed fibers, ensuring stable performance.
Competitive over LX4 for shorter distances: LRM offers greater distance on multimode fibers compared to 10GBASE-LX4 (SR alternatives) in many legacy environments.
● Comparing 10G SFP+ Options
Standard | Fiber Type | Wavelength | Max Reach | Notes |
---|---|---|---|---|
MMF (OM3/OM4) | 850 nm | 300 m / 400 m | Standard, short-range module | |
10GBASE-LRM | MMF (OM1–OM3) | 1310 nm | up to 220/300 m | With EDC, avoids recabling |
Single-mode SMF | 1310 nm | up to 10 km | Long-distance backbone links |
● LINK-PP Example: 10GBASE-LRM Module

LINK-PP offers an SFP+ 10GBASE-LRM module—model LS-MM3110-S2I—that embodies this standard:
Wavelength: 1310 nm
Max Reach: Up to 220 m on multimode fibers
Form Factor: LC duplex connector, SFP+ housing
Use Case: Seamless upgrades of legacy fiber infrastructures
Interface specifics and specs are available in the datasheet PDF.
● Final Thoughts
For environments with installed multimode fiber, the SFP-10G-LRM transceiver delivers a practical upgrade path to 10 Gbps performance while minimizing cost and disruption. It is a smart, standards-compliant choice for many enterprise and data center scenarios.