Turning off v.42bis seems to make the problems go away. I've got no real
idea about exactly why, but it seems to work. I was able to stay
connected for several hours last night and finish my FreeBSD box's cvsup
for the first time on a PM3. If anyone else would like to try it, the
most common string for turning off v.42bis (but leaving MNP-5 on) is
\N3%C1. (You don't really need the \N3 if your modem is set to default to
that. It is conceivable that some may have \N4 or \N5 set, which is a bad
idea.)
This would explain why I don't have this problem on our PM2Es... they've
obviously got different modems. If I had to guess, I'd say that v.42
isn't implemented correctly with the digital modems.
Nick
--- Nick Johnson, writer of code, fixer of modems, administrator of pops Gulf Coast Internet Network Engineering Team Check the web: http://www.gulf.net/support/network_status/