Xref: utzoo comp.sys.att:11273 comp.unix.sysv386:3334
Newsgroups: comp.sys.att,comp.unix.sysv386
Path: utzoo!utgpu!cunews!micor!esleng!dag
From: dag@esleng.uucp (David A. Gilmour)
Subject: Re: Hardware Flow Control on tty
Message-ID: <1990Dec23.022105.29635@esleng.uucp>
Organization: Excalibur Systems Limited
References: <2173@westmark.WESTMARK.COM>
Distribution: na
Date: Sun, 23 Dec 90 02:21:05 GMT

In article <2173@westmark.WESTMARK.COM> dave@westmark.WESTMARK.COM (Dave Levenson) writes:
>I am trying to use a high speed V.32 modem on a tty port using AT&T
>SysV/386r3.2.2.  The modem allows the DTE and DCE speeds to differ,
>and then offers a choice of flow control methods.
>
>The HARDWARE flow-control option causes the modem to assert CTS
>until its buffer is nearly full, and then to drop CTS.  UNIX seems
>to ignore the not-CTS state, and continues to send data. Is there
>any way to get the UNIX tty device driver to recognize and react to
>this signal?
>

I had exactly the same problem with my ISC SVR3.2 system using a T2500
modem.  It turned out that RTS/CTS handshaking is *NOT* supported in the
ISC drivers.  This may be the problem with yours.

I fixed the problem by installing the FAS 2.07 drivers.  I don't know
if they will help you or not.  The source is available on the net, or
I can mail it to you.


-- 
__________________________________________________________________________
David A. Gilmour            |   
Excalibur Systems Limited   |   uunet!mitel!cunews!micor!esleng!dag
Kanata, Ontario, Canada     |