Modem
Bill Irwin
bill at twg.UUCP
Sat Jun 16 18:10:01 AEST 1990
In article <1990Jun15.224120.27813 at virtech.uucp> cpcahil at virtech.UUCP (Conor P. Cahill) writes:
>
>However, it requires that the port on which the user logs in to be set up in
>modem control mode (i.e. it requires DTR from the modem to enable the
>login). The loss of DTR is the mechanism used by the system to determine
>when the line is lost.
I've always thought that it was the computer that asserted DTR when the
port was enabled and ready to spawn a getty, as soon as CD is present.
If DTR isn't true, the modem's auto answer is disabled until the port is
ready (DTR true). Once the modem connects and asserts CD, the getty
comes up. If the line is lost, CD goes, and any orphaned processes on
the port are killed if HUPCL is on.
Isn't this right or am I totally out to luch?
--
Bill Irwin - TWG The Westrheim Group - Vancouver, BC, Canada
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