Cisco SFP-10G-LRM2 Compatible 10GBASE-LRM SFP+ 1310nm 2km DOM Duplex LC SMF Optical Transceiver Module

Overview

Bridge the gap between short-reach and long-haul connections with the SFP-10G-LRM2 Compatible transceiver. This module is a high-performance extension of the standard LRM technology, designed to drive **10 Gigabit Ethernet** signals up to **2 kilometers** over standard **Multimode Fiber (MMF)**. It is the perfect solution for campus networks and large enterprise buildings where standard SR modules (300m limit) fall short, but expensive Single-Mode Fiber (SMF) upgrades are not feasible.

The SFP-10G-LRM2 utilizes a 1310nm Fabry-Perot (FP) laser transmitter, distinguishing it from the 850nm VCSEL lasers found in standard SR modules. This wavelength allows for better signal penetration and reduced modal dispersion over older fiber types like OM1 and OM2, as well as modern OM3 and OM4 cabling.

Key Features

• Extended Multimode Reach: Supports links up to 2km on MMF (compared to the standard 220m of LRM).
• Wavelength: Operates at 1310nm, offering superior propagation characteristics over MMF.
• Legacy Support: Ideal for utilizing installed bases of OM1 (62.5 micron) and OM2 (50 micron) fiber.
• Connector: Duplex LC interface.
• Compatibility: Fully compliant with MSA SFP+ standards and IEEE 802.3ae specifications.
• Digital Diagnostics: Features DOM/DDM for real-time monitoring of laser status and temperature.

Applications

The SFP-10G-LRM2 is specifically engineered for “middle-distance” scenarios:

• Campus Backbones: Connecting buildings within a university or corporate campus using existing multimode risers.
• Large Data Centers: Connecting rows or zones that exceed the 300m limit of standard SR optics.
• Legacy Fiber Reuse: Upgrading 1G backbones to 10G without ripping out and replacing older OM1/OM2 fiber plants.
• Government & Military: Reliable connectivity for secure facilities with pre-installed multimode infrastructure.

Specifications

Cross-Platform Compatibility

Our 10GBASE-LRM2 modules are coded for broad interoperability. While “LRM2” is often a specific vendor enhancement, our modules are compatible with standard LRM ports and specific extended-reach configurations found in equipment from:

Advantages

The primary advantage of the SFP-10G-LRM2 is **investment protection**. Replacing fiber cabling is one of the most expensive and disruptive upgrades a network can undergo. By using this module, you can achieve 2km distances on the multimode fiber already in your walls, avoiding the massive construction costs associated with pulling new Single-Mode Fiber (SMF).

FAQ (Technical & Product Questions)

1. Does this module require a mode conditioning patch cord (MCP)?

In many cases with legacy OM1/OM2 fiber, a **Mode Conditioning Patch cable** is highly recommended to prevent Differential Mode Delay (DMD) which causes signal jitter. For OM3/OM4 fiber, a standard patch cord is usually sufficient, but checking your specific link quality is always advised.

2. What is the difference between LRM and LRM2?

Standard LRM (Long Reach Multimode) is specified by IEEE to reach 220m. LRM2 is an enhanced, often vendor-specific optimization that pushes the reach of the 1310nm laser on multimode fiber up to 2km, filling the gap between 220m and 10km.

3. Can I use this module with Single-Mode Fiber (SMF)?

Technically, 1310nm is a single-mode wavelength, and this module may work over short distances of SMF. However, it is optimized for Multimode. For guaranteed performance on SMF, you should use an SFP-10G-LR module instead.

4. Will this work in a port configured for SFP-10G-SR?

No. You typically need to configure the port specifically for **LRM** (Long Reach Multimode) operation. The switch needs to know it is dealing with a 1310nm laser, not the 850nm laser used in SR modules.

5. Is this module hot-swappable?

Yes, like all standard SFP+ modules, the SFP-10G-LRM2 is fully hot-swappable. You can insert or remove it from the switch port without powering down the device.