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From: venta@otello.sublink.org (Paolo Venta)
Newsgroups: comp.sys.att
Subject: serial printer problem on 3b2-600
Message-ID: <587@otello.sublink.org>
Date: 23 Aug 90 00:56:22 GMT
Organization: Consorzio Telematix, Milano - Italy
Lines: 32

Hello, maybe some1 of you knows the trick to make a serial printer
work correctly on a 3b2-600.

Printer: Mannesmann MT131/9
Machine: at&t 3b2-600

Problem: printer is loosing characters, handshake xon/xoff does not
	 work though it's set. 

Printer's menu says xon/xoff handshake is enabled.
My interface script for the printer contains a:

stty -parity -tabs -hupcl cread -ixany ff1 ixon -ocrnl onlcr -onocr
opost 9600 0<&1

(on the same line). 
I tried both short and long buffer on the printer. Same results,
at different times (longest the buffer, latest the problem, but it
always occurs).

Now, before loosing more time trying hardware handshake with 
ctsflow, i wonder if someone is using a similar printer on this
hardware. To use ctsflow i probably need to make a custom cable
since the mt131 uses pins 10,11 and 19 of V24 as 'ready' signal,
which appears to be the cts/rts stuff. 

Thanks a lot for any information!
Paolo

-- 
Paolo Ventafridda     -*-     INTERNET: venta@otello.sublink.org
TELEMATIX MILANO - Via C.Gomes 10, 20124 Milano -  +39-2-6706012