Hayes H08-15530, User Manual

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Troubleshooting 23
Problem: Your modem does not make a connection.
Solution: If your modem places calls but never connects,
make sure you are dialing the right number and that
the remote modem is turned on.
Problem: You receive bursts of errors occasionally, but
otherwise data quality is good.
Solution: The connection may have been established on poor-
quality or noisy telephone lines. Hang up and place
the call again to try to obtain a better connection.
Someone may be picking up an extension connected
to the line that your modem is using. If your modem
is sharing a telephone line with other telephones, in-
form the other users when you will be making a data
call, or install a separate line dedicated to data calls.
Your telephone line may have a Call Waiting feature
and a call is being received. See the Call Waiting
discussion above.
Problem: Random errors occur or data is missing in
transmitted data.
Solution: Use the MNP or V.42 protocol if the remote modem
supports one of these protocols. See the table on
page 21 for more information.
Select a lower baud rate in your communications
software and place the call again.
If both modems are using the MNP or V.42 protocol,
the only way this can occur is if your modem and
communications software are not using the appro-
priate flow control. Configure your communications
software for
RTS/CTS (hardware) flow control. Your
computer will now pause for the transmission to be
stored.