The GLC‑LH‑SMD is a 1 Gbps, 1000BASE‑LX/LH SFP optical transceiver from Cisco. It supports 1310 nm wavelength, making it suitable for both single‑mode (SMF) and multimode (MMF) fiber links, and includes Digital Optical Monitoring (DOM) for real-time diagnosticsReach & Compatibility Single‑mode fiber (9/125 µm): up to 10 km Multimode fiber (50/62.5 µm): up to 550 m (mode‑conditioning patch cord required) Fully compliant with IEEE 802.3z (1000BASE‑LX), hot‑swappable, and fits all Cisco devices with SFP ports.Technical Specifications Data rate: 1.25 Gbps max Connector: Duplex LC Wavelength: 1310 nm DOM/DDM: Yes (~power, temperature, bias current monitoring) Operating temp: 0–70 °C (many optics also available in industrial versions up to –40–85 °C) Power consumption: < 1 W Ideal Use Cases Long-distance backbone or inter-building links via single-mode fiber Short-run connections (e.g., within a data center) using multimode fiber Diagnostics and proactive maintenance with DOM suppo Download
