ZyXEL Communications ZyXEL Ethernet Switches: 4 Troubleshooting

ENGLISH

5

3.4 Console Port (Managed Switches Only)

If your switch has a console port, you can use a terminal 

emulator for local management. Connect the male 9-pin end 

of a console cable to the console port of the switch. Connect 

the female end to a serial port (

COM1

, 

COM2

 or other COM 

port) of your computer. Configure the computer with terminal 

emulation software to the following parameters: 

• VT100 terminal emulation

• 9600 bps

• No parity, 8 data bits, 1 stop bit

• No flow control

4 Troubleshooting

PROBLEM

CORRECTIVE ACTION

None of the 

LEDs are on 

when the power 

is connected.

Verify that the included power or cable 

adaptor is connected to the switch's power 

receptacle and appropriate power source. 

If the error persists, you may have a 

hardware problem and should contact your 

vendor.

The 

LNK/ACT

LED does not 

light up or flash 

when a device 

is connected.

Verify that the attached device(s) is turned on 

and properly connected to your switch. Also 

make sure the Ethernet cards are working on 

the attached devices. Verify that the network 

cable does not exceed 100 meters.

6

ENGLISH