Cisco Gigabit SFP Transceiver Module – MMF/SMF (GLC-LH-SMD)

The Cisco Gigabit SFP Transceiver Module (GLC-LH-SMD) is a high-performance, hot-swappable optical module designed for 1000BASE-LX/LH Gigabit Ethernet applications. Supporting both single-mode and multimode fiber, this versatile dual-mode transceiver operates at a 1310 nm wavelength and delivers reliable long-distance connectivity. With Digital Optical Monitoring support, extended temperature range, and broad compatibility across Cisco networking devices, the GLC-LH-SMD is ideal for enterprise networks, data centers, and campus deployments.

Product Features

Dual-Mode Fiber Support

Compatible with both single-mode and multimode fiber, providing flexible deployment across different network infrastructures.

Gigabit Ethernet Performance

Supports 1 Gbps data transmission with stable and efficient optical connectivity for enterprise and data center applications.

Digital Optical Monitoring

Includes DOM functionality for real-time monitoring of temperature, voltage, transmit power, and receive power.

Long-Distance Connectivity

Enables transmission distances of up to 10 km over single-mode fiber and up to 550 meters over multimode fiber.

Hot-Swappable Design

Allows installation and removal without powering down network devices, ensuring minimal disruption.

Extended Temperature Operation

Operates reliably in a wide temperature range from -5°C to 85°C, suitable for demanding environments.

High Compatibility

Designed for Cisco switches and routers while remaining compliant with industry SFP standards.

Product Specifications

• Data Rate: 1 Gbps (1.25 Gbps bi-directional)
• Wavelength: 1310 nm
• Connector Type: Dual LC/PC
• Fiber Type: Single-mode (SMF) and multimode (MMF)
• Maximum Distance:10 km over single-mode fiber (9/125 µm), 550 m over multimode fiber (50/62.5 µm)
• Transmit Power: -9.5 dBm to -3 dBm
• Receive Sensitivity: -20 dBm to -23 dBm
• Receiver Overload: -3 dBm
• Optical Budget: Approximately 10.5 dB to 13.5 dB
• Wavelength Range: 1270 nm to 1355 nm
• Power Consumption: Typically less than 1W; maximum 1.3W
• Voltage: 3.3V nominal (3.1V to 3.5V range)
• Form Factor: SFP (Small Form-Factor Pluggable)
• Dimensions (H x W x D): 0.33 x 0.53 x 2.22 inches (8.5 x 13.4 x 56.5 mm)
• Operating Temperature: -5°C to 85°C
• MTBF: Over 3,000,000 hours
• DOM Support: Yes (SFF-8472 compliant)
• Compliance: Class 1 Laser, RoHS, MSA compliant
• Minimum Cable Distance: 2 meters (6.5 feet)