User`s guide

28 56K Message Modem
PROBLEM DIAGNOSIS POSSIBLE SOLUTION
Your
communications
software is
reporting many
cyclic redundancy
check (CRC) errors
and low characters
per second (CPS).
You may have a bad phone
line.
Optimal flow control
settings may not be enabled
on your modem.
The serial port rate in your
communications software
may be set too high for your
area’s phone lines or your
modem’s UART.
The remote site you are
dialling into may have
trouble with the file transfer
protocol.
There may be a Terminate
and Stay Resident (TSR)
program (such as a screen
saver or virus scanner)
running in the background,
disrupting data
communications.
You may be trying to
download a file to a
compressed area of your
hard drive.
Try placing the call again. The
phone company routes calls
differently each time.
Type this command in Terminal
Mode to load the optimal hardware
flow control settings, AT&F1 and
press ENTER.
Lower the serial port rate in your
communications software to 57,600
bps, 38,400 bps or 19,200 bps. Do
not use 14,400, 28,800, or 33,600.
The port rate for a ITU-T V.90/x2
modem cannot be set lower than
57,600, if you want to achieve a
ITU-T V.90/x2 connection.
Try using a different file transfer
protocol. Do not use Xmodem if
other protocols are available.
Disable any Terminate and Stay
Resident (TSR) programs running
in the background. If you have
software running as a TSR, check
the software’s manual for
information about disabling its ability
to operate as a TSR.
Download to an uncompressed area
on your hard drive.