Date: Tue, 12 Oct 2021 09:42:55 -0400 From: matthew sporleder <msporle...@gmail.com> Message-ID: <CAHKF-AtpTrW_MnOq5WeB1njpzCuQBjcyexaM_X1LeEmXrjw=u...@mail.gmail.com>
| Do you mean modem like a telephone modem or modem like a serial port? I meant telephone modems - they're what most uses DTR as a functional signal, and it is disabling that signal that all this is about. (There were other devices that behaved similarly, but they're even less likely to be seen now.) The serial port is the system interface to the modem (that is the interface in question - modems that are implemented on ISA/EISA/PCI/PCIe/... cards are entirely different beasts, though I believe that some of those, probably even most, present a system interface that looks like a serial port, and most likely manipulating the fake DTR on that fake serial port would have similar effects). And yes, I know that these things are not quite as commonly used these days as they were in the 1970's and 80's ... kre