Type: SFP (mini-GBIC) transceiver module, Form Factor: Plug-in module, Connectivity Technology: Wired, Cabling Type: Ethernet 1000Base-ZX, Data Link Protocol: Gigabit Ethernet, Data Transfer Rate: 1.25 GBps, Optical Wave Length: 1550 nm, Max Transfer Distance: 43.5, Compliant Standards: IEEE 802.3z, Left Connector Type: LC single-mode, Interfaces: 1 x Ethernet 1000Base-ZX - LC single-mode female The GLCZXSMRGDST is a Cisco GLC-ZX-SM-RGD compatible fiber transceiver module that has been designed, programmed and tested to work with Cisco brand compatible switches