Operating instructions

PART III: SECTION B: TROUBLESHOOTING AND ONLINE HELP RESOURCES
116
PROBLEM DIAGNOSIS POSSIBLE SOLUTION
a Your
communications
software is
reporting many
cyclic redundancy
check (CRC)
errors and low
characters per
second (CPS).
D You may have a bad phone
line.
D Optimum flow control
settings may not be
enabled on your modem.
D The serial port rate in your
communications software
may be set too high for
your modem’s UART or
your area’s phone lines.
D The remote site you are
dialing into may have
trouble with the file
transfer protocol.
D There may be a Terminate
and Stay Resident (TSR)
program running in the
background, interfering
with data
communications.
1 Try placing the call again. The phone company routes
calls differently each time.
1 Type this command in terminal mode to load the
optimum settings: AT&F1 <enter>.
1 Lower the serial port rate in your communications
software to 38,400 bps or 19,200 bps.
1 Try using a different file transfer protocol. Do not use
Xmodem if other protocols are available.
1 Disable any TSR programs running in the background.