Paradyne COMSPHERE 3911 Installation And Operation Manual page 228

COMSPHERE 3900 Series Modems
Symptom
The data is scrambled.
Data is missing during a transfer.
B-6
Table B-6
Online Operation
Verify that the character format (data bits, parity, and stop bits) is set to
the same value in both modems.
Verify that you are using the same method of flow control for both the
modem and the DTE.
If using XON/XOFF flow control, verify that the modem's parity
matches the DTE's parity.
September 1998
Action
3910-A2-GN32-40