[cmptrnerd6]

Entirely possible I don't understand something as I'm not sure what you mean by taking advantage of higher data rates. We're sending data over UART at the max rate that doesn't introduce too many bit errors. Mainly we needed a protocol to correct for the bit errors (by rerequesting data) and I've always used x/y/z modem for that purpose.

I picked Kermit this time because I didn't want to implement x/y/z modem again and had never used Kermit.

This [1] claims Kermit is faster in some instances depending on what features you have enabled.

[1] http://www.columbia.edu/kermit/perf.html

[shrubble]

I was wrong, and you are correct! I had thought that XMODEM was more efficient as the bandwidth increases but I was wrong; due to the fixed length of time for the ACK response, the efficiency drops to under 80% at a data rate of 9600bps; Kermit does not have this issue.