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From: krol@ux1.cso.uiuc.edu (Ed Krol)
Newsgroups: comp.sys.proteon
Subject: Serial Communication Problems for P4100(+)
Summary: P4100's dont work on 56kb lines which test normally
Keywords: 56kb 4100 4100+ abort
Message-ID: <1990Aug28.174603.23948@ux1.cso.uiuc.edu>
Date: 28 Aug 90 17:46:03 GMT
Distribution: comp
Organization: University of Illinois at Urbana
Lines: 12

We have been trying to install a group of P4100's (some P4100+'s)
connecting over 56kb digital circuits to a central P4200.  We installed
one and it worked just fine.  Then we tried to install a few more
and the line tests OK with a BERT tester, but when we stick
the P4100 on it gets receive aborts on the P4100 end.  Next we stick
a P4200 on in its place and it works just fine.  Proteon claims
we are the only site which is having this problem.  Anyone else
seen this?

It seems line related P4100 which won't work on a line will work
on a line where other P4100's are working.  Since P4100+ uses the
same serial card the problem occurs with them as well.