100% CISCO GLC-LH-SMD COMPATIBLE SFP TRANSCEIVER: Works with Cisco switches like Firepower, ASR920, IE2000, IE4000, ASR1000 and others TECHNICAL SPECS: 1000BASE-LX/LH | 1 Gbps | Single Mode (SMF)/Multi Mode (MMF) | LC Connector | 1310nm | Digital Diagnostic Monitoring (DDM) | Distances up to 40km (24.8mi) TESTED FOR OEM HOST COMPATIBILITY: Hot-swappable in Cisco routers and switches; DDM support reports the transceiver's status to most SNMP network management tools OUTSTANDING SUPPORT: Backed by StarTech.com for the life of the module itself, not your equipment; our modules won't void your OEM support and with access to our Tech Advisors 5/24 WORKS WITH MSA COMPLIANT SWITCHES: Also works with switch models from Ubiquiti, D-Link, Netgear, Supermicro, TP-Link and more that accept uncoded modules Maximize cost-savings and network performance with this bulk pack of single-mode/multi-mode Mini-GBIC modules Gigabit Fiber SFP Transceiver Module Cisco GLC-LH-SMD Compatible / Meets or exceeds OEM specifications and MSA industry standards Lifetime warranty / Maximum distance 10km/6.2 mi. (SM) and 550m/1804 ft. (MM) 1000Base-LX/LH / Gb fiber SFP 10 Pack / Supports Digital Diagnostics Monitoring (DDM)