... wavelength 5.80km LC Genuine Original Cisco GLC-ZX-SMD 1000Base-ZX SFP Singlemode transceiver, 1550nm wavelength, 80km LC General Information:Cisco ... change. The Cisco Short Form Pluggable (SFP) optics names will remain the same as GLC-SX-MM, GLC-LH-SM, and GLC ... -ZX-SM. Manufacturer: Cisco Systems, Inc Manufacturer Part Number: GLC-ZX-SM= Product Name:1000Base ...