Allied Telesis AT FH824U AT-FH824U - Manual (Page 24)

Installation
14
Verifying System
Operation
Verify that all attached devices have a valid connection. The hub monitors the link
status for each port. If any device is properly connected to the hub and
transmitting a link beat signal, the Link LED will light up for the corresponding
port. If the Link LED fails to light when you connect a device to the hub, check the
following items:
!
Be sure all network cables and connectors are properly attached to the
connected device and the hub.
!
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.
!
Verify that you have not exceeded the specified limits for cable length. No
twisted-pair cable should exceed 100 meters (328 feet). When attaching a
100 Mbps hub to the repeater ports, only one hub can be cascaded and the
maximum length of inter-hub cabling is 5 meters (16 feet). Also note that
when using fiber optics, you can run a cable up to two kilometers (1.24
miles) when using full-duplex, or up to 412 meters (0.25 miles) with half-
duplex.
!
When using an optional uplink module, both sides of the connection must
use the same transmission mode (half- or full-duplex). If any device is
connected to the 100Base-FX module, then you must manually set the
transmission mode using the toggle switch or the configuration options
provided by the Agent Module.