METHOD AND SYSTEM FOR AUTOMATIC DETECTION FOR ISDN SWITCH TIME IN NORTH AMERICA

摘要

An ISDN modem is preprogrammed to operate by any one of multiple ISDN protocols, and is provided with a setup program wherein, with the modem connected to an ISDN switch, the multiple protocols are automatically tested one-at-a-time until one is found by which a successful connection to the switch may be made, or until all fail. In the event a successful connection is made, that protocol in use at the time of the successful connection is selected for continued use. In the event that all preprogrammed protocols fail, a user is offered an input mechanism whereby an alternative protocol selection may be entered for trial.