puder (09/02/82)
We have a Racal-Vadic VA820 MACS (Multiline Automatic Calling System), a VA831BM3 adapter and several VA3481SX3 modems. Does anyone have a version of uucp that can handle one dialer multiplexed over several lines like this? We could make the mods ourselves, but why repeat someone else's work?
obrien@Rand-Unix@sri-unix (09/11/82)
Date: Thursday, 9 Sep 1982 15:51-PDT If you are running Berkeley UNIX, you will find a file "dnd.c" in /usr/src/cmd which uses the (somewhat fixed-up by Berkekey) multiplexer system to run the Vadic MACS crate. We've used it for years now with no problem. It is wise to go into UUCP and change some timing constants, since with this system the dialer write returns immediately, and the dialing takes place while you wait for the line to open. "dnd" creates multiplexed files in /dev that look like /dev/cua0, etc. You have to edit the source to correspond to your configuration. "dnd" will eat phone numbers written on the various multiplexed files and resend the number to the real dialer over a tty line, prefaced by the right Vadic stuff to make the modem selection.