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From: JMS@ARIZMIS.BITNET.UUCP
Newsgroups: mod.computers.laser-printers
Subject: Dataproducts LZR 2665 peculiarities
Message-ID: <8702121659.AA26325@ucbvax.Berkeley.EDU>
Date: Sun, 8-Feb-87 23:06:00 EST
Article-I.D.: ucbvax.8702121659.AA26325
Posted: Sun Feb  8 23:06:00 1987
Date-Received: Fri, 13-Feb-87 21:46:23 EST
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The ARPA Internet
Lines: 26
Approved: laser-lovers@washington.arpa

Anyone using a Dataproducts LZR2665 might be interested in knowing
how the RS232 port works.
 
Although the documentation says that switching to DTR/DSR flow control
is done via the postscript SETSCCBATCH and SETSCCINTERACTIVE commands,
the actual hardware doesn't support this without field modification.
 
Specifically, on the distribution panel for the 25 and 9 pin connectors,
a series of jumpers are used to jump the appropriate pin from the connector
to some electronics on the board.
 
Ergo, to use pin 20 (let's say) for DTR/DSR flow control, one has to
find out which of the jumpers connects to pin 20 on the serial connector,
and install a wire-wrap or jumper to connect this to the electronics
on-board.
 
This appears to be true for all pins (except ground), although the
factory has thoughtfully provided jumpers for pins 2 and 3.
 
If anyone ran into this problem and this message doesn't solve itk
feel free to contact me.
 
jms
 
Joel M Snyder (jms@arizmis.bitnet), University of Arizona MIS Department,
Tucson, Arizona, 85721, (602) 621-2748.