Category 5 Cable Specifications; Twisted Pair Cables; Table C-1. Electrical Requirements Of Category 5 Cable - NETGEAR FS 517TS User Manual

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)

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.
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
cabling guidelines C-3