NETGEAR FS 726 User Manual

Page 44

Advertising
background image

C-3

cabling guidelines

Category 5 Cable Specifications

Table C-1 lists the electrical requirements of Category 5 UTP cable.

Table C-1. Electrical Requirements of Category 5 Cable

Specifications

Category 5 Cable Requirements

Number of pairs

Four

Impedance

100

± 15%

Mutual capacitance at 1 KHz

5.6 nF per 100 m

Maximum attenuation

(dB per 100 m, at 20° C)

at 4 MHz: 8.2

at 31 MHz: 11.7

at 100 MHz: 22.0

NEXT loss (dB minimum)

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

TM

automatically senses which

connection, MDI or MDI-X, is needed and makes the right connection.

Advertising
This manual is related to the following products: