sbhattac@rnd.GBA.NYU.EDU (Shankar Bhattacharyya) (03/22/91)
A couple of days ago I posted a question on comp.unix.questions on hooking modems up to a four-wire leased line. The modems connect a dumb terminal at one end with a 386 machine running SCO Xenix (3.2) at the other. The connection at the machine is to tty1a. The line will be used only for incoming logins, i.e. there are no plans to ever use it for anything else. The modems are AMT Stars, 2400 baud, allegedly Hayes compatibles. With information obtained from the net - for which my thanks - we were able to get the modems talking to one another, but we can't yet run logins. At the terminal end we send an ATD. At the machine we get into cu and send an ATA to the modem. At that point we can write from the terminal to the console, and from the keyboard at the machine to the terminal screen, but we cannot yet run logins. At least the wiring is right. What do I have to do at the machine? /etc/ttys and /etc/gettydefs seem to be set properly for a 2400 baud login. Tty1a has been enabled. I presume I have to force carrier detect, and DTR, at the modem attached to the machine. The CD seems to be OK, but DTR is not. And what do I have to do to send the ATA to the modem without getting into cu to do it? echoing ATA to /dev/tty1a seems not to have the same effect. And if I do it from cu and then disconnect, DTR goes out. I would appreciate any advice I can get, including guidance to the manuals. Reading the Xenix manuals has been complicated by the fact that neither the vendor nor the site saw any reason to keep their system manuals. I could not find anyone who even knew what a Unix manual was, but I am looking elsewhere for them. I don't have much exposure to Xenix, and know next to nothing about any Xenix peculiarities that I might have to deal with, so please bear with any dumb questions. My thanks for any information you can send along. - Shankar ---------------------------------------------------------------------- Shankar Bhattacharyya, Information Systems, New York University sbhattac@rnd.gba.nyu.edu ----------------------------------------------------------------------