File Transfer Problems - AT&T DataPort PCX Modem User Manual

Troubleshooting
S: Your telephone may have Call Waiting enabled. Refer to
your local telephone book for procedures to disable this
feature. You may add the disable code to your dial strings.
S: To test your modem hardware, perform a Local Analog
Loopback test (AT&T1) and verify that data entered at the
computer is echoed back to the computer. Before starting
the test, disable Error Control mode using either the AT\N0
or AT\N1 command. Issue the AT&T1 command, and begin
to enter data from your keyboard. It should appear on your
monitor. To stop the test, escape to Command mode (+++)
and issue the AT&T0 command.
P: Your modem does not disconnect the call and hang up.
S: Change the setting of the &D command from Ignore (&D0)
to Standard RS-232 operation (&D2).

File Transfer Problems

P: You are transmitting a compressed file, but the
throughput seems to be slow.
S: MNP5 data compression can add more overhead to a
compressed file. Disable data compression using the
QuickLink II Fax Connection Setup window, and resend the
file.
P: You experience several errors while transferring a file.
S: Verify that your modem and communications software are
configured for the same type of flow control, for example,
either RTS/CTS (AT&K3) or XON/XOFF (AT&K4).
If you are using XON/XOFF flow control, make sure the
modem's parity matches the computer's parity. Verify this
within the communications software.
Make sure that your modem's parity matches the parity of
the remote end. A mismatch in parity will cause eccentric
errors, such as a single line constantly being repeated.
6-6
Issue 2 July 1995