The Cisco GLC-T is a hot-pluggable 1000BASE-T SFP transceiver module providing 1 Gbps Gigabit Ethernet connectivity over copper cabling, with a maximum distance of 100 meters. It uses an RJ-45 connector and is widely used for enterprise networking to connect switches and routers. It operates within a commercial temperature range (0 to 70°C) It is in used but good condition.
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