'g' protocol was what everyone ran. 64 byte
packets, in a three packet
window. By default. But 'g' could really race
along, if provoked. The
window could slide up to seven! Unless you were running Xenix, where
that provoked a core dump. On most systems,
increasing the window size
meant binary patching uucico.
Anybody remember the Telebit trailblazer modems that snooped on the g
protocol going through them?