AIX to LINUX stty command – data download stops at 10K. What settting?

AIX – stty raw ixon ixoff -echo -echonl -echone -echok 9600 < $mytty AIX download works fine. LINUX command stty raw ixon ixoff -echo -e -echo -enl -echo -ee - echo -ek 9600 < $mytty Can transmit - but stops at 10K.