| Interesting. The only two forms of flow control I'm familar with are XON/XOFF and CTS (clear to send).
CTS is done by toggling a wire in the serial cable on and off; it's hardware flow control, so it won't display bits on the send/receive wires of the serial cable, so we would never see it in the data capture.
XON/XOFF (ctrl-Q, ctrl-S), or ASCII characters 21 and 23, and is controlled by software (and would show up in a bytestream). I couldn't identify any XON/XOFF data in the postings.
Do you think they use a flow control of their own design, then?
I find it hard to believe they would use software flow control with something at 38400 BPS, but I suppose it's possible.
My guess is they would dump it all out with a checksum value, and if the computer software detects a bad checksum, it requests it to be resent again, until it gets it right.
Hopefully Lifescan will reveal to us the real specs. | 
