Netgear 700 Series Managed Switch for Software v2.1 User Manual download pdf (Page 129)

700 Series Managed Switch User’s Guide for Software v2.1

Cabling Guidelines B-3

SM-10004-02

Table-B-1. Electrical Requirements of Category 5 Cable

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

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

1 2 ... 124 125 126 127 128 129 130 131 132 133 134 ... 151 152

No comments

Netgear 700 Series Managed Switch for Software v2.1 User Manual Page 129