Hi Folks, I have an ancient, but fully functional pizza-box like device from "Pan Dacom" ("V.24 Umschalter"), which has 9 DB25 female connectors on the back, and 8 toggle pushbuttons on the front. One of the DB25 connectors is the input, and is connected to one or more of the other eight DB25 connectors, depending on which buttons are toggled "on" on the front.
any interest? Rob Urban