Netgear GS748Tv2 GS748Tv3 User Manual - Page 66

Smart Switch Software User Manual GS748T Category 5 Cable Specifications Ensure that the fiber cable is crossed over to guarantee link. Table C-1 lists the electrical requirements of Category 5 UTP cable. Table C-1. Electrical Requirements of Category 5 Cable Specifications Number of pairs Impedance Mutual capacitance at 1 KHz Maximum attenuation (dB per 100 m, at 20° C) NEXT loss (dB minimum) Category 5 Cable Requirements Four 100 ± 15% 5.6 nF per 100 m at 4 MHz: 8.2 at 31 MHz: 11.7 at 100 MHz: 22.0 at 16 MHz: 44 at 31 MHz: 39 at 100 MHz: 32 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 C-1 illustrates straight-through twisted pair cable. C-2 Network Cabling v1.0, October 2007