NETGEAR WG602v3 Router Manual PDF (Setup & Configuration Guide)

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User’s Guide for the WG602 v3 54 Mbps Wireless Access Point

Network, Routing, Firewall, and Cabling Basics

C-13

202-10060-01, September 2004

Inside 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-4

illustrates straight-through twisted pair cable.

Figure C-4:

Straight-Through Twisted-Pair Cable

Figure C-5

illustrates crossover twisted pair cable.

Figure C-5:

Crossover Twisted-Pair Cable

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Figure C-6:

Category 5 UTP Cable with Male RJ-45 Plug at Each End

Note

: Flat “silver satin” telephone cable may have the same RJ-45 plug. However, using telephone

cable results in excessive collisions, causing the attached port to be partitioned or disconnected

from the network.

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. 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. The second method is to use a crossover

cable, which is a special cable in which the transmit and receive pairs are exchanged at one of the

two cable connectors. Crossover cables are often unmarked as such, and must be identified by

comparing the two connectors. Since the cable connectors are clear plastic, it is easy to place them

side by side and view the order of the wire colors on each. On a straight-through cable, the color

order will be the same on both connectors. On a crossover cable, the orange and blue pairs will be

exchanged from one connector to the other.

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User’s Guide for the WG602 v3 54 Mbps Wireless Access Point

Network, Routing, Firewall, and Cabling Basics

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202-10060-01, September 2004

The WG602 v3 Access Point incorporates Auto Uplink

TM

technology (also called MDI/MDIX).

Each LOCAL Ethernet port will automatically sense whether the Ethernet cable plugged into the

port should have a normal connection (e.g. connecting to a PC) or an uplink connection (e.g.

connecting to a router, switch, or hub). That port will then configure itself to the correct

configuration. This feature also eliminates the need to worry about crossover cables, as Auto

Uplink

TM

will accommodate either type of cable to make the right connection.

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Preparing Your PCs for Network Access

D-1

202-10060-01, September 2004

Appendix D

Preparing Your PCs for Network Access

This appendix describes how to prepare your PCs to connect to the Internet through the 54 Mbps

Wireless Access Point WG602 v3.

For adding file and print sharing to your network, please consult the Windows help information

included with the version of Windows installed on each computer on your network.

Preparing Your Computers for TCP/IP Networking

Computers access the Internet using a protocol called TCP/IP (Transmission Control Protocol/

Internet Protocol). Each computer on your network must have TCP/IP installed and selected as its

networking protocol. If a Network Interface Card (NIC) is already installed in your PC, then TCP/

IP is probably already installed as well.

Most operating systems include the software components you need for networking with TCP/IP.

Windows 95 or later includes the software components for establishing a TCP/IP network.

In your TCP/IP network, each PC and the wireless access point must be assigned a unique IP

addresses. Each PC must also have certain other TCP/IP configuration information such as a

subnet mask (netmask), a domain name server (DNS) address, and a default gateway address. In

most cases, you should install TCP/IP so that the PC obtains its specific network configuration

information automatically from a DHCP server during startup.

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