Netgear GS516T GS516T Reference Manual - Page 31
Twisted Pair Cables for 100 BASE-TX
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Twisted Pair Cables for 100 BASE-TX 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 UplinkTM automatically senses which connection, MDI or MDI-X, is needed and makes the right connection. Figure C-1 illustrates straight-through twisted pair cable. 1 Tx 2 A 3 Rx 6 1 Rx 2 B 3 Tx 6 Key: A = Uplink or MDI port (as on a PC) B = Normal or MDI-X port (as on a hub or switch) 1, 2, 3, 6 = Pin numbers Figure C-1. Straight-Through Twisted Pair Cable Figure C-2 illustrates crossover twisted pair cable. 1 Rx 2 B 1 Rx 2 B 3 Tx 6 3 Tx 6 Key: B = Normal or MDI-X port (as on a hub or switch) 1, 2, 3, 6 = Pin numbers Figure C-2. Crossover Twisted Pair Cable cabling guidelines C-5
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