Netgear FS102 Benutzerhandbuch

Model FS102, Model FS104, Model FS108 Fast Ethernt Switch Installation Guide

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. Most ports on switches and repeaters have media-dependent interfaces with
crossover ports. These ports are referred to as MDI-X or normal ports. Computer and workstation
adapter cards are usually media-dependent interface ports referred to as MDI or uplink ports. 

The figures illustrate the use of straight-through and crossover twisted pair cables.

Yellow Rx/Tx 
Collision LED is 
blinking 
excessively.

Data collision is 
occurring on the port.

The port and switch might be functioning correctly. 
However, check the following to make sure that 
excessive collisions are normal (as in most Ethernet 
networks) and not caused by:

• Incorrect cabling or connectors
• Wiring techniques
• Mismatched duplex operating mode settings

Green FDX LED is 
off when you have 
set the port to 
operate in full-
duplex mode.

Port is operating in 
half-duplex mode.

Make sure the connected device is able to operate at 
half-duplex mode and check the specifications of the 
connected device to make sure it has the ability to 
signal the operating mode. Verify that the connected 
device is operational. If the connected device is an 
adapter card, make sure you have an adapter card 
that is capable of 100 Mbps operation and set to 100 
Mbps if it is not autosensing. 

8146EB

Tx

Uplink or

MDI port

Normal or

MDI-X port

Normal or

MDI-X port

Normal or

MDI-X port

Rx

1

2

3

6

Tx

Rx

1

2

3

6

1

2

3

6

1

2

3

6

Tx

Rx

Tx

Rx