Netgear RP614 User Manual download pdf (Page 99)

Reference Manual for the Model RP614 Web Safe Router

Network and Routing Basics B-11

Ethernet Cabling

Although Ethernet networks originally used thick or thin coaxial cable, most installations currently

use unshielded twisted pair (UTP) cabling. The UTP cable contains eight conductors, arranged in

four twisted pairs, and terminated with an RJ45 type connector. A normal "straight-through" UTP

Ethernet cable follows the EIA568B standard wiring and pinout as described in Table B-3.

Uplink Switches, Crossover Cables, and MDI/MDIX Switching

In the wiring table above, the concept of transmit and receive are from the perspective of the PC,

which is wired as Media Dependant Interface (MDI). In this wiring, the PC transmits on pins 1 and

2. At the hub, the perspective is reversed, and the hub receives on pins 1 and 2. This wiring is

referred to as Media Dependant Interface - Crossover (MDI-X). When connecting a PC to a PC, or

a hub port to another hub port, the transmit pair must be exchanged with the receive pair. This

exchange is done by one of two mechanisms:

• Uplink switch

Most hubs provide an Uplink switch which will exchange the pairs on one port, allowing that

port to be connected to another hub using a normal Ethernet cable.

Table B-3. UTP Ethernet cable wiring, straight-through

Pin Wire color Signal

1 Orange/White Transmit (Tx) +

2 Orange Transmit (Tx) -

3 Green/White Receive (Rx) +

4Blue

5 Blue/White

6 Green Receive (Rx) -

7 Brown/White

8Brown

1 2 ... 94 95 96 97 98 99 100 101 102 103 104 105 106 107

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Netgear RP614 User Manual Page 99