会社のニュース Cisco SFP-10G-LRM 10G SFP+ Optical Module: High-Performance 1310nm 220m Connectivity Solution for Modern Netw

The Cisco SFP-10G-LRM 10G SFP module is a high-performance optical transceiver designed for 10Gbps Ethernet transmission over multimode fiber networks up to 220 meters. As enterprise data traffic continues to grow rapidly, demand for stable, low-latency, and cost-efficient optical connectivity has significantly increased. This module provides a reliable solution for upgrading legacy fiber infrastructure without full replacement, ensuring seamless interoperability with Cisco switches and routers. Featuring a 1310nm wavelength, LC duplex interface, and IEEE 10GBASE-LRM compliance, it delivers stable optical performance, low power consumption, and excellent compatibility across enterprise and data center environments.

The SFP-10G-LRM Cisco optical module is a hot-pluggable small form-factor pluggable plus (SFP+) transceiver designed for 10 Gigabit Ethernet applications. It operates at a center wavelength of 1310nm, utilizing a Fabry-Pérot or DFB laser source optimized for long-reach multimode transmission. The module supports LC duplex fiber connectors and complies with the IEEE 802.3ae 10GBASE-LRM standard, which defines 10Gbps serial optical communication over legacy multimode fiber types such as OM1, OM2, and OM3.

From a physical and engineering perspective, the module integrates a transmitter optical subassembly (TOSA), receiver optical subassembly (ROSA), and digital control circuitry within a compact SFP+ housing. It supports signal encoding at 10.3125 Gbps and ensures signal integrity through built-in equalization and dispersion compensation techniques, allowing reliable transmission up to 220 meters. The module also includes Digital Diagnostic Monitoring (DDM), enabling real-time monitoring of optical power, temperature, bias current, and voltage parameters, which is essential for maintaining link stability in high-density network environments.

Modern enterprise networks face increasing pressure from bandwidth-intensive applications such as cloud computing, virtualization, AI workloads, and high-definition video transmission. Traditional 1G infrastructure is no longer sufficient, while replacing entire fiber cabling systems is often cost-prohibitive. The SFP-10G-LRM module solves this critical challenge by enabling 10G upgrade over existing multimode fiber infrastructure, significantly reducing capital expenditure.

One of the key advantages is legacy fiber compatibility (OM1/OM2 support), allowing enterprises to extend the lifecycle of installed cabling systems. This is particularly valuable in campus networks, hospitals, universities, and government institutions where fiber replacement is disruptive and expensive. Another major benefit is long-reach multimode transmission up to 220m, which exceeds standard SR modules in certain legacy environments, providing greater deployment flexibility.

Additionally, the module offers low power consumption (~1W), which helps reduce operational costs in large-scale data center deployments. The inclusion of DOM monitoring capability enhances network reliability by allowing IT engineers to detect optical degradation before failure occurs. Finally, full Cisco compatibility and multi-vendor interoperability ensure seamless integration into heterogeneous network environments, eliminating vendor lock-in and simplifying procurement strategies.

The SFP-10G-LRM Cisco module is widely deployed in enterprise and carrier-grade network environments where high-speed data transmission over existing fiber infrastructure is required. In a typical data center scenario, this module is used to connect Top-of-Rack (ToR) switches to aggregation switches, enabling 10Gbps uplinks without replacing existing multimode fiber cables.

For example, in a campus network environment such as a university, legacy OM1 fiber installed between buildings can still be reused. By deploying SFP-10G-LRM modules in Cisco Catalyst switches, network engineers can upgrade bandwidth from 1G to 10G while maintaining the same physical fiber layout. This significantly reduces downtime and infrastructure renovation costs.

In enterprise data centers, the module supports high-density server-to-switch connectivity, particularly in virtualization clusters and cloud storage systems where low latency and high throughput are critical. The 1310nm wavelength ensures stable signal transmission across longer multimode distances, while the LC duplex interface provides standardized physical connectivity.

From a technical deployment perspective, engineers must ensure proper fiber classification (OM1/OM2/OM3) and may use mode conditioning patch cords when operating on older fiber types. The module’s built-in Digital Diagnostic Monitoring allows real-time performance tracking, enabling proactive maintenance and reducing unexpected network failures.

In telecom edge networks, the SFP-10G-LRM module is also used in metro aggregation nodes where cost-efficient 10G upgrades are required. Its hot-swappable design allows technicians to replace modules without powering down equipment, ensuring uninterrupted service in mission-critical environments.

The SFP-10G-LRM module is used for 10Gbps Ethernet transmission over multimode fiber, especially in legacy fiber environments requiring infrastructure reuse and cost-effective upgrades.

Yes, it is fully with Cisco Catalyst, Nexus, and ASR series devices that support standard SFP+ 10G interfaces.

It supports up to 220 meters over OM1/OM2/OM3 multimode fiber depending on installation conditions and fiber quality.

Yes, it is recommended for OM1 and OM2 fiber to ensure signal stability, while OM3 may not require it under optimal conditions.

Yes, it supports full DDM functions including optical power, temperature, voltage, and bias current monitoring in real time.

LRM uses 1310nm wavelength for legacy fiber up to 220m, while SR uses 850nm wavelength optimized for OM3/OM4 fiber up to 300m.

The Cisco SFP-10G-LRM module provides a highly efficient solution for upgrading legacy fiber networks to 10Gbps performance without infrastructure replacement. With strong compatibility, stable optical performance, and cost-effective deployment advantages, it is widely used in enterprise and data center environments.