{"id":3180,"date":"2026-05-12T06:07:34","date_gmt":"2026-05-12T06:07:34","guid":{"rendered":"https:\/\/lp.szlogic.cn\/products\/lr-sfp-module-10gbase-lr-specs-compatibility\/"},"modified":"2026-05-26T08:07:00","modified_gmt":"2026-05-26T08:07:00","slug":"lr-sfp-module-10gbase-lr-specs-compatibility","status":"publish","type":"post","link":"https:\/\/lp.szlogic.cn\/ru\/products\/lr-sfp-module-10gbase-lr-specs-compatibility","title":{"rendered":"LR SFP Module Guide \u2014 10GBASE-LR Specs and Compatibility"},"content":{"rendered":"
\"LR<\/figure>\n\n\n\n

An LR SFP (<\/strong>10GBASE-LR<\/strong><\/a>) module<\/strong> is a single-mode optical transceiver that typically operates at ~1310 nm<\/strong> and provides reliable 10 Gb\/s links up to 10 km<\/strong> over standard single-mode fiber (9\/125 \u00b5m), used for campus backbones, inter-building links, and metro data-center interconnects.<\/p>\n\n\n\n

LR matters because many real-world networks\u2014such as campus backbones, inter-building connections, and short metro data center interconnects\u2014exceed multimode limits but do not require extended-reach optics. This guide covers 10GBASE-LR technical specifications, link-budget calculation, vendor compatibility considerations, procurement checklists, deployment validation steps, and practical resources for reliable implementation.<\/p>\n\n\n\n

🔹 What Is an LR SFP Module and Why It Matters<\/strong><\/h2>\n\n\n\n
\"What<\/figure>\n\n\n\n

An LR SFP module<\/strong><\/a> implements the 10GBASE-LR physical layer defined in IEEE 802.3ae, using single-mode optics around ~1310 nm to support point-to-point 10 Gb\/s Ethernet links up to 10 km over standard single-mode fiber (SMF). It is the industry-standard solution for building-to-building connections, campus backbone networks, and medium-reach aggregation links.<\/p>\n\n\n\n

Under the 10GBASE-LR specification, the optical interface is designed for operation over 9\/125 \u00b5m single-mode fiber<\/strong>, providing sufficient optical budget to maintain reliable transmission across typical campus or metro distances without amplification. Most LR SFP modules comply with the mechanical and electrical interface defined by SFF-8472 for Digital Optical Monitoring<\/a> (DOM\/DDM), enabling real-time reporting of transmit power, receive power, module temperature, supply voltage, and laser bias current.<\/p>\n\n\n\n

Compared with short-reach SR optics<\/a> (850 nm over multimode fiber), LR modules are optimized for lower fiber attenuation and longer spans. At ~1310 nm, typical fiber attenuation is significantly lower than multimode 850 nm systems, allowing links up to 10 km under standard link-budget assumptions as defined in IEEE performance parameters.<\/p>\n\n\n\n

Key Characteristics of LR SFP Modules<\/h3>\n\n\n\n