Intel Express 410 Guide De L'utilisateur page 27

FAQs/Troubleshooting
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How can I set the speed or duplex on individual ports?
Normally the switch handles all connections automatically but if you
need to force speed or duplex, (for example, to accommodate older
devices that don't support autonegotiation) use the Local Management.
I've connected the cable but the left port LED (link) is off. Why?
• Remove the cable and plug it in again. Wait up to six seconds for a link.
• Make sure you're using the correct type of cable (straight-through or
crossover) for the device you want to connect to. If you're using the
wrong cable, the link LED will not come on.
• Make sure the device you've connected to a port is a 10Base-T or
100Base-TX device. The Express 410T/F Standalone Switches don't
support 100Base-T4 devices running at 100Mbps. However, they do
support T4 devices running at 10Mbps.
• Check the speed and duplex settings on the PC's network adapter.
• The cable is defective.
I keep getting an intermittent loss of link (or data is not being
transmitted). Why?
• You may be using the wrong grade of cable. The wrong cable can cause
erratic performance and you may eventually lose the connection
between the port and the attached device.
• Check the duplex setting for the device connected to the port. You may
have to use the Local Management to force the port to half- or full-
duplex.
• A cable segment somewhere in your collision domain may be too long.
Make sure none of your UTP cabling is longer than 100 meters.
• Check the Ethernet cable pairs. The TX pairs (pins 1 and 2) and the RX
pairs (pins 3 and 6) should be twisted pairs. See diagram in page 24.
After I connect to the Local Management I see a blank screen.
Why?
• Make sure you are using a null modem cable (included).
• Check the settings in your terminal program. They should be set to
9600 baud, 8 data bits, No parity, 1 stop bit, and No flow control.
• Try pressing c + R to force the screen to repaint.
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