Dell Precision T3400 User's Guide - Page 30

4 network adapter To attach your computer to a network or broadband device, connector connect one end of a network cable to either a network jack or your network or broadband device. Connect the other end of the network cable to the network adapter connector on your computer. A click indicates that the network cable has been securely attached. NOTICE: Do not plug a telephone cable into the network connector. On computers with an additional network connector card, use the connectors on the card and on the back of the computer when setting up multiple network connections (such as a separate intra- and extranet). It is recommended that you use Category 5 wiring and connectors for your network. If you must use Category 3 wiring, force the network speed to 10 Mbps to ensure reliable operation. 5 network activity light The network activity light is on (flashing) when the computer is transmitting or receiving network data. A high volume of network traffic may make this light appear to be in a steady on state. 6 line-out connector Use the green line-out connector to attach headphones and most speakers with integrated amplifiers. On computers with a sound card, use the connector on the card. 7 line-in connector Use the blue line-in connector to attach a record/playback device such as a microphone, cassette player, CD player, or VCR. On computers with a sound card, use the connector on the card. 8 Rear Dual USB 2.0 connectors (2) Use the back USB connectors for devices that typically remain connected, such as printers and keyboards. NOTE: It is recommended that you use the front USB connectors for devices that you connect occasionally, such as flash memory keys or cameras, or for bootable USB devices. 30 About Your Computer