High speed upload via kermit: help wanted

[XIAO Yan]

A user in our system uploads files regularly from his Mac to a
4D/320.  His files are of about 500k. He uses kermit at 19200 baud
link.  However,  he can only get 900CPS (character per second),
which is only about 40% of the line speed.  We also tried 38000
baud (changing the source code of kermit a little bit...), but the
resulting transmit speed did not change. Mac actually showed the
efficiency of transmitting.

Does anybody know a faster way?

xiao