Zyxel ES-4124 [4/22] Troubleshooting

Dimension Ethernet Switches

Your switch comes with auto-negotiating, auto-crossover ports. Depending on the model, these ports are either

fast Ethernet (10/100 Mbps) or Gigabit (10/100/1000 Mbps) ports. Auto-negotiating ports can detect the speed

of incoming transmissions and allow either half duplex transfer mode (10/100 Mbps only) or full duplex mode.

Auto-crossover means that you can connect the switch to a computer or hub using either a straight-through or a

crossover Ethernet cable.

Network Cables

You can use unshielded twisted pair (UTP) or shielded twisted-pair (STP) Ethernet cables for RJ-45 ports.

Make sure the cable length between connections does not exceed 100 meters (328 feet). The following table

describes the types of network cable used for different connection speeds.

Table 1 Network Cable Types

SPEED NETWORK CABLE TYPE

10Mbps 100Ω 2-pair UTP/STP Category 3,4 or 5

100Mbps 100Ω 2-pair UTP/STP Category 5

1000Mbps 100Ω 4-pair UTP/STP Category 5

The LNK/ACT LED should flash when data is being sent between your switch and a connected device.

Power Connection

Connect one end of the supplied power cable or power adaptor to the power receptacle on the switch and the

other end to the appropriate power source. The PWR LED should turn steady on if the switch is receiving

power.

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

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.