User manual

AT-1700
38
Experiment with Possible Solutions
The first rule of troubleshooting is to isolate the problem. As you
experiment, only vary one factor at a time. Substitute known
good equipment and see if the problem persists or is eliminated.
❑ Do not overlook the obvious—make sure the card is seated in
the computer and that the cables and connectors are securely
attached.
❑ If the LINK LED does not light with UTP or fiber media, make
sure the cabling is intact and connected to a functioning
network port.
❑ If the LINK LED lights on a 10BASE-T segment, but data
transfer is slow, collision-prone, or non-existent, verify that
your cable is of level 3, 4, 5 , or IBM type 1 (see Chapter 7,
Important 10BASE-T Cable Considerations). Level 1 and 2
voice-quality cable will not work properly.
If the cable is more or less round in section, you probably have
data grade cable, correctly paired, and no transmission
problems. If, however, the cable appears flat in section (as
“Silver Satin” telephone-type cable) you probably have voice-
grade cable and transmission problems. If it looks like
telephone cable, double-check it.
❑ If the computer is on a 10BASE-T segment, make sure the
“wire type” setting in the CardAssistant configuration menu
matches the impedance of the wire. If the computer is on a
10BASE2 segment, make sure the cable is connected with
T-connectors, terminated at the ends with 50 Ω terminators,
and grounded in only one place.
❑ If you suspect the network adapter card is not working
properly, disconnect the computer from the network and run
CardAssistant diagnostics after rebooting with no drivers
loaded.
❑ If CardAssistant software does not detect the card, it could
mean a conflict between the card and another device, a card
613-10434-00.bk Page 38 Monday, March 18, 1996 2:53 PM