Table 3-1. Troubleshooting An Installation - Motorola 82543 Owner's Manual

A
Problem
A speed/status LED flashes
green and does not change to
solid green when the cable is
connected.
The speed/status LED flashes
green and does not change to
solid green when the cable is
connected.
The 1000 Mb/s mode has been
selected, but the 1000 Mb/s
LED is not lit.
A-2

Table 3-1. Troubleshooting an Installation

Probable Cause
The cable connecting to the
PMC or the PMC connection
is faulty.
The PMC is faulty.
A carrier detect (CD) signal
could not be detected because
the network cable is loose,
disconnected, or connected to
a device that does not support
1000 Mb/s mode.
Corrective Action
Verify the integrity of the
cable and cable connection. If
the cable is defective, replace
it. Verify that the cable has
been connected between
transmit to receive and receive
to transmit.
Note: Point-to-point system
connections require a cross-
over cable.
For 10 Mb/s and 100 Mb/s
connections, connect a
loopback connector and
observe the results:
If the speed/status LED
changes to solid green (does
not flash), a problem exists
with the cable or the
concentrator.
If the speed/status LED
flashes green, replace the
PMC.
If no loopback connector is
available, test the
concentrator. If the
concentrator is functional,
replace the PMC.
Check that the network cable
is connected to the network
port, that the connection is
secure, and that the connected
device supports 1000 Mb/s
mode.
Gigabit Ethernet/82543 PMC Installation and Use