User Manual

Proprietary and Confidential
49
Troubleshooting and getting help
Network connection problem
Network connection problem
If the green link LED on the Ethernet port is off, then there is no network
connection and you will not be able to get on to the Internet. This can be due to
excessive Ethernet traffic
.
However, if the problem persists, it may be due to a
power or cable problem.
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To find the source of the problem
1
Check the status LED to make sure the SOMAport 140 is receiving power. If the
status LED is off, see “To check the power” on page 48.
2
Check the connections on the SOMAport 140 and the PC or hub to make sure
they are secure.
3
Check the cable length.
4
Check the cable type.
5
Test the cable.
a
Turn off the SOMAport 140 and the computer or hub.
b
Replace the cable with another one of the same type.
c
Turn on the systems and see if you can get a connection.
6
If you are using a USB cable, there may be a problem with the USB port. Try
getting a connection using an Ethernet cable.
IF the cable type is THEN it should not exceed
Ethernet 100 m (328 feet)
USB 5 m (15 feet)
RS-232 15 m (50 feet)
IF the SOMAport 140 connects
to THEN make sure you are using a
the Ethernet port of a PC straight-through cable
This cable is shipped with the SOMAport 140.
the Ethernet port of a hub crossover (null modem) cable
This cable is not shipped with the SOMAport
140.