Date   : Wed, 02 Feb 1983 17:07:00 EST
From   : Frank J. Wancho <FJW@mit-mc.arpa>
Subject: HELP!

Several problems have converged to cause problems with LMODEM
transfers to and from MC - thus the dearth of new material in MC:CPM;.
The problem does not lie with either LMODEM nor your end.  The problem
is a combination of ARPANET backbone problems (MIT is/was connected to
the rest of the net by one circuit instead of the normal two - and
that one has been flakey), memory problems at MC itself, and in
general, high TCP overhead in the net (compared to the old NCP).
Another problem related to all of this for some of us, when everything
else does perform "properly", is the fixed-size 64-byte TAC input
buffers can be (and are) overrun when trying to upload 132-byte blocks
at 1200 bps...

What all this means is that until these other problems are
solved/fixed, there is little you or the rest of us can do, short of
modifying LMODEM (and MODEM on your end) to tolerate very long pauses
in transmissions...  and by the time that is done, I would hope the
problems that caused the change would have been resolved.


--Frank