Date: Sat, 21 Jun 1997 09:13:06 +0200 From: j@uriah.heep.sax.de (J Wunsch) To: freebsd-current@FreeBSD.ORG Subject: Re: getty modem control Message-ID: <19970621091306.KP10523@uriah.heep.sax.de> In-Reply-To: <199706202227.PAA24698@phaeton.artisoft.com>; from Terry Lambert on Jun 20, 1997 15:27:38 -0700 References: <199706200815.IAA15687@veda.is> <199706202227.PAA24698@phaeton.artisoft.com>
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As Terry Lambert wrote: > > Further to the discussion on the subject of (m)getty back in > > February, would it work to use DSR as RI for those ports > > without RI? > > 9 pins: > > chassis ground (evil waste of a pin) > TXD > RXD > RTS > CTS > DSR > signal ground > DCD > DTR Wrong. Try again. The DB-9 connector doesn't have a protection ground pin. But it does have a ring indicator pin (pin 9). What they've been dropping was things like the external clock lines. So while it's not that evil that UART-equipped PC cards have only a DB-9, it's evil if modem manufacturers start to produce DB-9 equipped modems, since you cannot run them in (externally clocked) sync mode anymore. -- cheers, J"org joerg_wunsch@uriah.heep.sax.de -- http://www.sax.de/~joerg/ -- NIC: JW11-RIPE Never trust an operating system you don't have sources for. ;-)
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