Phoenix Contact FL SWITCH SFN and SFNT 5GT Industrial Ethernet Switches feature five TP RJ45 ports, automatic detection of data transmission speed of 10/100/1000Mbps (RJ45), an autocrossing function, and the ability to read Quality of Service (QoS) priority messages. These Phoenix Contact Ethernet switches support the auto negotiation function at the twisted pair ports and offer transmission speeds of 10/100/1000Mbps. Mixed operation for the connection of segments with different data transmission speeds is also supported. The RJ45 ports offer an auto crossing function, which means it is not necessary to make a distinction between 1:1 and crossover cables. In case of heavy traffic, packets tagged with higher priority 802.1Q or Differentiated Services values will be given preference. The switch has four internal priority queues. SFNT 5GT Ethernet Switches also accept security frames and feature a wide operating temperature range of -40ºC to +75ºC.