Cisco GLC-ZX-SM-RGD=. Connectivity technology: Wired. Operating temperature range (T-T): -40 - 85 °C. Safety: Laser Class I 21CFR1040 LN#50 7/2001, Laser Class I IEC 60825-1. Cabling technology: 1000BASE-ZX, Interface: SFP, Connector(s): LC/PC