User's Manual

Troubleshooting
This section explains how to isolate and diagnose problems with the switch. If you have a problem that is not listed here and you can not solve it, please
contact your supplier.
LEDs
The following sections discuss troubleshooting associated with the LEDs:
l All LEDs are off
Check the following:
¡ The cable to connect the switch. Ensure that you're using an RJ-45 (network) cable and not an RJ-11 (telephone) cable.
¡ Ensure that the power cord is firmly connected to the relevant switch unit and to the supply outlet. If the connection is secure and there is still no
power, you may have a faulty power cord.
¡ Verify that there is sufficient space for adequate airflow on both sides of the switch.

l On powering-up, the Self-test LED lights orange.
¡ The relevant switch unit has failed its power on Self-test because of an internal problem. See "Technical Assistance" for more information.
Ports
The following section discusses troubleshooting associated with ports:
l Port does not work
Check the following:
¡ The cable connections are secure and the cables are connected to the correct ports at both ends of the link.
¡ The port status is configured at "Enable" and the auto-negotiation feature is enabled at the switch. See "Port Manager" for more information.
Interfaces
The following sections discuss troubleshooting related to the switch interfaces:
l The terminal cannot access the switch
Check the following:
¡ Your terminal is correctly configured to operate as a VT100 terminal.
¡ You are using a proper null modem cable.
¡ The settings on your terminal are correct. See "Installation" for more information.
l The Web browser cannot access the switch
Check the following:
¡ The IP information for the switch is correctly configured.
¡ The switch is powered-up.
Technical Specifications
NOTE: Operating temperature for the switch must not exceed 40 ºC.
The switch should not be placed in the direct sunlight or near warm air exhausts or heaters.
Standards
Ethernet types supported
IEEE 802.3 Type 10Base-T, IEEE 802.3u Type 100
Base-TX, IEEE 802.3z, IEEE 803.ab
Other standards supported
IEEE 802.3x, IEEE 802.1d, IEEE 802.1q, IEEE 802.1p,
IEEE 802.3ad
Interfaces
10/100BASE-T ports
24
10/100/1000BASE-T ports
2
GBIC slots
2
Gigabit stacking ports
2
RS232 connector
1
Indicators