Verifying System Operation - HP J4091A Installation And Reference Manual

HP 100Base-T Hub 8 Installation and Reference Guide

Verifying System Operation

Verify that all attached devices have a valid connection. The hub monitors
link status for each port. If any device is properly connected to the hub and
transmitting a link beat signal, the Link indicator lights up for the corre-
sponding port. If the Link indicator fails to light up 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 RJ-45 plug snaps into place when
attached.
Verify that if the cable is connected to an MDI-X port on the hub, the
other end must be to an MDI port of the network device and vice versa.
Test by alternately connecting to the 8MDI and 8MDI-X ports.
See if the twisted-pair cable is functioning properly by using it for
another port and attached device that already displays valid indications
when connected to the network.
Check the length of the twisted-pair connection to be sure it does not
exceed 100 meters.
Verify that the cable is Category 5.
Test the adapter for an attached workstation by trying it in another com-
puter that has been successfully connected to the network.
If you still can't resolve the problem, please refer to Troubleshooting in
Appendix A.
Installing the System 2-5