Path: utzoo!utgpu!news-server.csri.toronto.edu!rutgers!uwm.edu!mixcom!sysop
From: sysop@mixcom.UUCP (System Operator)
Newsgroups: comp.dcom.modems
Subject: Re: Practical Peripherals 9600
Message-ID: <95@mixcom.UUCP>
Date: 9 Dec 90 16:53:55 GMT
References: <1990Dec9.054531.20417@mnemosyne.cs.du.edu>
Organization: MIX Communications, Milwaukee, WI (Public access Usenet, Email)
Lines: 34

In article <1990Dec9.054531.20417@mnemosyne.cs.du.edu> aburt@mnemosyne.cs.du.edu (Andrew Burt) writes:
>
[deleted]
>
>Having read the earlier posting about problems with slower speeds, I
>was very curious to try this out... and found it to be true.  I also spent
>some time with PPI tech. support and think the problems will be solved soon.
>
>Without changing any settings, the modem has had major problems with (non-mnp)
>2400 or 1200 bps modems.  MNP modems or 9600 bps -- no problems.
>

Any recent reader of this group has probably read my 9600SA reports.

There was one test I had not tried until moments ago.  
I disabled error correction in the 9600SA, 
then called it using a non-error correcting 2400.
Most of the connect-disconnect problems went away!  Reenable EC
in the 9600SA, and the connect-disconnect problem returns
if the calling modem is not using error correction.
(The disconnect happens immediately after the modem connect.
This is not caused by a timeout.)

Conclusion: a firmware bug in the 9600SA.

I will ask PPI for the revision 1.18 ROM that has been
reported in other messages.  Standby for the further adventures
of MODEM MANIA!

Dean Roth

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