Cisco GLC-LH-SMD 1000Base-LX/LH SFP – 1 G Gigabit Fiber SFP Transceiver Module

Description

The Cisco GLC‑LH‑SMD= is a high‑performance Gigabit SFP (Small Form‑Factor Pluggable) fiber optic transceiver module designed to deliver reliable 1 Gbps connectivity over both single‑mode and multimode fiber networks. Compliant with the IEEE 802.3z 1000BASE‑LX/LH standard, this SFP module operates at a wavelength of 1310 nm and supports transmission distances of up to 10 km over single‑mode fiber (SMF) and up to 550 m over multimode fiber (with a mode conditioning cable) — making it ideal for enterprise, campus, data center, and service provider networking environments.

Featuring a hot‑swappable design, it installs easily into compatible Cisco switches, routers, or other devices with SFP slots without interrupting network uptime. The module includes digital optical monitoring (DOM) capability, enabling real‑time diagnostics of optical parameters such as transmit/receive power, temperature, and voltage — helping IT teams proactively manage performance and stability.

Key Features:

• Supports 1000BASE‑LX/LH Gigabit Ethernet over fiber optics for high‑speed network uplinks.

• Operates at 1310 nm wavelength with a reach of up to 10 km (SMF) or 550 m (MMF with conditioning).

• LC duplex connector for secure, low‑loss fiber connections.

• Hot‑swappable modular design enables simple field installation without powering down equipment.

• Digital Optical Monitoring (DOM) support for real‑time performance and link diagnostics.