DS-3E0105P-E/MPoE SwitchPorts 1 to 4 support IEEE 802.3af standard.When the switch is in EXTEND mode and the data rate is 10 Mbps, ports 1 to 4 support long-distance data transmission up to 250 meters.All ports support 6 kV lightning protection.This switch supports Auto MDI/MDIX.This switch supports..