SFP-Port 1000 BASE-LX mini-GBIC module - 20km. Multi-mode. Complies with the IEEE 802.3z Gigabit Ethernet standard. 1 x 1000Mbps TP/LC fiber port. LC connector. Differential PECL inputs and outputs. Single power supply 3.3V. TTL signal detect indicator. Hot Pluggable. Class 1 laser product complies with EN 60825-1. Operating temperature: 0ºC up to 60º C.