Dell LATITUDE C510 - Manual (Page 76)

Check the printer -
Run the printer self-test. If the test does not complete successfully, the printer is probably
defective. Contact the printer manufacturer.
Modem and Internet Connection Problems
NOTICE: Connect the modem to an analog telephone wall jack only. Connecting the modem to a
digital telephone network damages the modem.
NOTICE: Modem and network connectors look similar. Do not plug a telephone line into the network
connector.
NOTE: Fill out the Diagnostics Checklist as you perform the various checks.
NOTE: Slow connection speeds can be caused by telephone noise as well as by telephone line or
network conditions. Contact your telephone company for more information.
NOTE: If you can connect to your Internet service provider (ISP), your modem is functioning properly.
If you are sure that your modem is working properly and you still experience problems, contact your
ISP.
Check the telephone wall jack -
Disconnect the telephone line from the modem and connect it to a telephone. Listen for a dial
tone. Ensure that you have touchtone telephone service. Try connecting the modem to a
different telephone wall jack.
Connect the modem directly to the telephone wall jack -
If you have other telephone devices sharing the line, such as an answering machine, fax
machine, surge protector, or line splitter, then bypass them and connect the modem directly to
the telephone wall jack with the telephone line.
Check the connection -
Verify that the telephone line is connected to the modem.
Check the telephone line -
Try using a different telephone line. If you are using a line that is 3 m (10 ft) or more in length,
try a shorter one.
Irregular dial tone -
If you have voice mail service, you may hear an irregular dial tone when you have messages.
Contact your telephone company for instructions on restoring a normal dial tone.
Turn off call waiting (catch-phone) -