Device Type: 1000BASE-LX/LH Gigabit Ethernet SFP Transceiver Module (Extended Temperature, DOM)
Brand/Model: Cisco GLC-LH-SMD
Video Output: N/A
Data Ports: 1× Duplex LC/PC Connector (Fiber Optic)
Fiber & Performance:
Standard: 1000BASE-LX/LH (IEEE 802.3z)
Data Rate: 1.25 Gbps (Gigabit Ethernet)
Wavelength: 1310 nm
Max Distance (Single-Mode Fiber): Up to 10 km (6.2 mi)
Max Distance (Multimode Fiber): Up to 550 m (1,804 ft) — requires mode-conditioning patch cable for legacy MMF
Digital Diagnostics: DOM (Digital Optical Monitoring) supported — real-time Tx/Rx power, laser bias, temperature, and supply voltage
Environmental & Physical:
Operating Temperature: −5°C to +85°C (23°F to 185°F) — extended temperature range, the key differentiator from the older GLC-LH-SM (0°C to 70°C)
Storage Temperature: −40°C to +85°C
Form Factor: Hot-swappable SFP (Mini-GBIC)
Power Consumption: Approx. 1 W (typical)
Compliance: IEEE 802.3z, SFF-8472, RoHS, TAA (on some compatible versions)
Key Specs: Cisco GLC-LH-SMD, 1000BASE-LX/LH SFP, 1310nm, 1.25Gbps, 10km SMF / 550m MMF, Duplex LC, DOM Support, Extended Temp −5°C to +85°C, Hot-Swappable
Usage: Campus Backbones, Metropolitan Network Links, Inter-Building Gigabit Connections, Enterprise Switch/Router Uplinks, Long-Reach Fiber Aggregation
