Lenovo ThinkPad T520 (English) User Guide - Page 199

Rear view ThinkPad Port Replicator Series 3 1 The power jack is for connecting the ac power adapter. 2 The Ethernet connector is for connecting the ThinkPad Port Replicator Series 3 to an Ethernet LAN. The indicator on the connector is the same as that on the computer. Notes: • You cannot use the Token Ring cable for this connector. • You can use this connector for a 10BASE-T/100BASE-TX/1000BASE-T Ethernet. If you attach your computer to the ThinkPad Port Replicator Series 3 and use an Ethernet connector, use the Ethernet connector on the ThinkPad Port Replicator Series 3, not the one on the computer. 3 The Universal Serial Bus connectors are for connecting USB 1.1 and USB 2.0 devices. 4 The external monitor connector is for connecting an external monitor. Note: If you attach your computer to the ThinkPad Port Replicator Series 3 and use an external monitor connector, use the external monitor connector on the ThinkPad Port Replicator Series 3, not the one on the computer. 5 When you attach a mechanical lock to the security keyhole, the eject button is locked so that the computer cannot be removed from the ThinkPad Port Replicator Series 3. Chapter 7. Enhancing your computer 181