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PRELIMINARY Chapter 8: Maintenance and Troubleshooting
Megabit Modem 500L Installation Manual 53
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TROUBLESHOOTING
If this occurs: Try this:
PC or hub not
communicating
with the modem
• Check the LINK LED. If it is off, check the cabling to the 10/100BASE-T port and to the
hub or the NIC card in the PC to ensure it is secure.
• Check the position of the MDI/MDI-X switch. Set the switch to MDI when connecting to
a PC. Set the switch to MDI-X when connecting to a hub or router.
• Check that you are using a Web browser (Netscape or Internet Explorer) version 4.0
or newer.
• Check that you have a TCP/IP protocol stack installed on your PC.
• If this is the initial installation, check that you set the IP address on your PC to obtain an
IP address automatically. See “Setting Up the PC to Request an IP Address” on page 18.
• Check the NIC card installation for correct IRQ, drivers, and adapter setup. See
appropriate documentation for the NIC card.
If none of the above corrects your problem, contact your service provider.
SYNC ADSL LED Contact the service provider when the LED remains off indicating that the modem is not
detecting a transceiver at the far end. Flashing green indicates that the modem is attempting
to bring up the link. Solid green indicates that the loop is up.
The modem synchronizes at a minimum transmission rate of 64 kbps. The modem rate
adapts in increments of 32 kbps.
MARGIN ADSL
LED lights green
Contact the service provider when the LED is off indicating that the margin is below that
specified by the service provider.
LAN TX and RX
LEDs are not on
Check that the LINK LED is on. If it is on, you are simply not transmitting or receiving data
on the LAN 10/100BASE-T port. If, however, the LINK LED is not on, check the section “PC
or hub not communicating with the modem” in this table.
ADSL TX and RX
LEDs are not on
Check that the SYNC LED is on. If it is on, you are not transmitting or receiving data on the
WAN ADSL port. If, however, the SYNC LED is not on, contact your service provider.