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Quick Installation Guide
9
9
Power and Cooling Problems
If the Power indicator does not turn on when the power cord is plugged in, you
may have a problem with the power outlet, power cord, or internal power supply
as explained in the previous section. However, if the unit powers off after
running for a while, check for loose power connections, power losses or surges
at the power outlet, and verify that the fan on back of the unit is unobstructed and
running prior to shutdown. If you still cannot isolate the problem, then the
internal power supply may be defective. In this case, contact your Accton
distributor for assistance.
Cabling and Adapters
If the Link indicator fails to light when you connect a device to the hub, check the
following items:
• Be sure the twisted-pair cable is properly attached to the connected device
and the hub. Verify that the media connector snaps into place when attached.
• See if your cable is functioning properly by using it for another port and
attached device that displays valid indications when connected to the network.
• Check the length of each twisted-pair cable to be sure it does not exceed 100
meters (328 feet). If you have cascaded two Fast Ethernet hubs together, be
sure the interhub cabling is no longer than 5 meters (16 feet).
• Verify that the workstation's adapter card is functioning properly by trying it in
another computer that has been successfully connected to the network.
Installation
Verify that all system components have been properly installed. If one or more
components appear to be malfunctioning (e.g., the power cord or network
cabling), test them in an alternate environment where you are sure that all the
other components are functioning properly.
Port and Cable Assignments
RJ-45 Port Description
RJ-45 (MDI-X) station ports can be attached to any devices which use a
standard network interface (e.g., a workstation, server, bridge or router). RJ-45
(MDI) daisy-chain ports can be cascaded to a station port on similar networking
devices (e.g., another hub or switch). Use unshielded twisted-pair (UTP) or
shielded twisted-pair (STP) cable for RJ-45 connections: 100Ω Category 3, 4 or
5 cable for 10 Mbps connections or 100Ω Category 5 cable for 100 Mbps
connections. Also be sure that the length of any twisted-pair connection does
not exceed 100 meters (328 feet).