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From: taylor@ecsvax.UUCP (Steven Taylor)
Newsgroups: net.dcom
Subject: Re: Penril woes
Message-ID: <1498@ecsvax.UUCP>
Date: Fri, 21-Jun-85 09:33:14 EDT
Article-I.D.: ecsvax.1498
Posted: Fri Jun 21 09:33:14 1985
Date-Received: Sun, 23-Jun-85 04:48:05 EDT
References: <1267@cbosgd.UUCP>
Organization: NC Educational Computing Service
Lines: 28

There are at least 3 prom sets for the Penril autodialers
in question.  The "vanilla" prom set does indeed keep
cd high (as best I remember) in order to keep terminals
happy.  (It was designed to be used with dumb crt's as
an outgoing device.)

A second version was designed specifically to work with Develcon
dataswitches in a bidirectional mode.  That is, they could 
be used on the switch for outgoing calls or incoming calls
on the same port.  I KNOW that this prom set does not keep cd
high, but brings it up in response to DTR coming high.  
(Remember, the dataswitch does not bring dtr high until it is trying to 
initiate a call.  This difference may be the root of the problem
mentioned.)  If you need more detailed info on this, I'll be
glad to discuss this firmware in detail.

Finally, there is also, I understand, a "Hayes compatible"
firmware set available now as well.

Your Penril rep should be willing to work with you on getting
a prom that will work, but you may have to get hin to do some
investigation before he will admit that the three version (minimum)
really exist.

Steven Taylor
Distributed Networking Associates
Charlottesville, VA 22901
(804) 979-0656