On Tue, 1 Apr 1997, Jon Lefman wrote:
> Thanks for the response.  I understand crtscts and mdmbuf, but why should
> my modem ignore change in dtr?  Would dtr ever drop when using pppd?

The Mac serial ports only have one "handshake out" pin; most of the cables
I've seen wire that pin to both DTR and RTS (or is it CTS? I always
confuse those two :) In any case, unless you set your modem to ignore DTR
(at&d0, usually), there's a chance that it'll hang up when you don't want
it to. Alternatively, you could increase the value of some S register that
specifies how long DTR must be low before the modem hangs up, although
there'd still be the chance of an accidental disconnection.

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