Zoom MAC - Manual (Page 25)

Chapter 3 Solving Common Problems 25
Problem: Your modem does not make a connection.
Solution: If your modem places telephone calls but never
makes a connection, make sure you are dialing
the right number.
The remote modem may be turned off.
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 con-
nected to the line that your modem is using. If
the modem is sharing a telephone line with
other telephones, inform the other users when
you will be making a data call.
Your telephone line may have a Call Waiting
feature and a call is being received. See the
previous Call Waiting discussion.
Problem: Random errors occur or data is missing in
transmitted data.
Solution: Use the MNP or V.42 protocol if the remote mo-
dem supports one of these protocols. See the
table on page 23 for more information.
Select a lower baud rate in your communica-
tions software and place the telephone 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 appropriate flow control. Configure
your communications software for RTS/CTS
(hardware) flow control. Your computer now
pauses for the transmission to be stored.