Netgear FVS124G FVS124G Reference Manual - Page 189
Inside Twisted Pair Cables, B-1
UPC - 606449040531
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Reference Manual for the ProSafe VPN Firewall 25 with 4 Gigabit LAN and Dual WAN Ports 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-1 illustrates straight-through twisted pair cable. Figure B-1: Straight-Through Twisted-Pair Cable Figure B-2 illustrates crossover twisted pair cable. Figure B-2: Crossover Twisted-Pair Cable Network, Routing, Firewall, and Basics 202-10085-01, March 2005 B-13