Cisco GLC-ZX-SM SFP Module

The Cisco GLC-ZX-SM 1000BASE-ZX SFP module is a Gigabit Ethernet transceiver that delivers long-range single-mode fiber connectivity up to 80 km at a 1550 nm wavelength. This small form-factor pluggable (SFP) device uses LC duplex connectors and includes Digital Optical Monitoring (DOM) for real-time link performance data. Designed for use in Cisco switches, routers, and other SFP-capable network devices, it enables high-speed uplinks and network expansion across campuses, data centers, and telecom backbones. Key specifications include a 1 Gbps data rate, SMF fiber compatibility, an operating temperature range of 0°C to 70°C, and support for 1000BASE-ZX operation over single-mode fiber. Common replacements referenced for Cisco networks include the GLC-LH-SMD, GLC-EX-SMD, and GLC-BX-D modules.