🚀 go-pugleaf

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.