3Com 3C900B Installation And Operating Instructions Manual page 98

PROBLEM
Your communications
software is reporting many
cyclic redundancy check
(CRC) errors and low
characters per second (CPS)
(cont.).
Errors are constantly
occurring in your V.17 fax
transmissions.
RapidComm fails to
initialize the modem.
94
T
ROUBLESHOOTING AND
DIAGNOSIS
You may be trying to
download a file to a
compressed area of your
hard disk.
Your modem initialization
string could be insufficient
for fax transmissions.
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.
Your baud rate may be set
too high.
You may be trying to fax
a compressed file
RapidComm's port
settings may be incorrect.
O H R
NLINE ELP ESOURCES
POSSIBLE SOLUTION
Download to an uncompressed area on your hard drive.
In your communications software, change the modem
initialization string to AT&H3&I2&R2S7=90.
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.
Lower baud rate to 9600, 7200, or 4800.
Open the file in the application in which it was created. Select
RapidComm as the printer and then print the file.
Make sure RapidComm's port settings are correctly set for your
modem.