NETGEAR fvs114 manual Inside Twisted Pair Cables

Reference Manual for the ProSafe VPN Firewall FVS114

Inside Twisted Pair Cables

For two devices to communicate, the transmitter of each device must be connected to the receiver of the other device. The crossover function is usually implemented internally as part of the circuitry in the device. Computers and workstation adapter cards are usually media-dependent interface ports, called MDI or uplink ports. Most repeaters and switch ports are configured as media-dependent interfaces with built-in crossover ports, called MDI-X or normal ports. Auto Uplink technology automatically senses which connection, MDI or MDI-X, is needed and makes the right connection.

Figure B-4illustrates straight-through twisted pair cable.

Figure B-4: Straight-through twisted-pair cable

Figure B-5illustrates crossover twisted pair cable.

Figure B-5: Crossover twisted-pair cable

Network, Routing, and Firewall Basics B-13

202-10098-01, April 2005