AT&T 7400B Plus User Manual page 130

CHAPTER 5: TROUBLESHOOTING
Page 5-8
Symptom
Transmitted and/or
received data contains
errors.
Far end data errors only
during file transfer with
PC communications
package.
The DATA LED is lit,
but a CONNECT xxxx
message or numeric
result code was not
displayed.
Numeric code returned
when CONNECT xxxx
message is preferred.
Problem
Speed settings of the
terminal device and the
7400B Plus are not the
same.
The local terminal
device and the far end
device are configured
for different parity
settings.
PC does not support
hardware flow control.
The display result codes
option is turned off.
The result code format
option is set to numeric
form.
DEFINITY Communications System
7400B Plus Data Module
Solution
Change terminal device speed
to agree with the speed that was
indicated in the CONNECT
nnnn message.
Change the parity setting of the
local terminal device to match
that of the far end device.
Disconnect the call, set the data
metering option to off (refer to
the section, Setting the DIP-
Switch Options in Chapter 2,
"Installation"), re-establish the
call, and try the file transfer
again.
Turn on the display result codes
option by typing
atq0 o ( )
Enter
The O command at the end of
the above command line will
cause the 7400B Plus to return to
the on-line mode and send the
CONNECT xxxx message, or an
equivalent numeric code, to the
terminal display (see ''Result
Codes'' in Appendix E).
Change the result code format
option to message form by
typing
atv1 ( )
Enter
User´s Guide