SVR4 (i386) serial port setup

Uwe Doering gemini at geminix.in-berlin.de
Wed May 15 00:03:47 AEST 1991


urban at cbnewsl.att.com (john.urban) writes:

>I forgot to ask this question before. The modem that you're using, does it
>have DTR strapped high or is it unstrapped?  If its strapped high, then I
>don't know what the problem is.  However, if it's unstrapped, you might
>not have the ,M in the Devices file for your "cu" port.
>
>ie: ACU tty01,M -  1200 hayes1200
>
>The ,M "tells" cu, ct or uucico not to worry about DTR during the \M to \m
>Dialers string in the Dialers file.  I the the BNU Guide talks about this.
>I don't have the guides in front of me.

This isn't quite right. I assume you meant DCD instead of DTR. DTR is
an output while DCD is the carrier detect input that blocks the open()
call if it is low.

       Uwe
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