Netgear FVM318 – Cable and DSL ProSafe Wireless VPN Security Firewall Manual De Referencia

Network, Routing, Firewall, and Wireless Basics

B-19

Note: The available channels supported by the wireless products in various countries are different.

The preferred channel separation between the channels in neighboring wireless networks is 25 
MHz (5 channels). This means that you can apply up to three different channels within your 
wireless network. There are only 11 usable wireless channels in the United States. It is 
recommended that you start using channel 1 and grow to use channel 6, and 11 when necessary, as 
these three channels do not overlap.

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 

.

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). 

1

Orange/White

Transmit (Tx) +

2

Orange

Transmit (Tx) -

3

Green/White

Receive (Rx) +

4

Blue

5

Blue/White

6

Green

Receive (Rx) -

7

Brown/White

8

Brown