Adapter card that selects between an ISDN interface and an analog modem interface

摘要

A computer includes an adapter. The adapter includes an ISDN connection capable of communicating ISDN signals between the computer and a remote device. The adapter also includes an analog modem connection capable of communicating analog modem signals between the computer and the remote device. A selector device selects either the ISDN connection or the modem connection with which to transfer information between the computer and the remote device. The adapter card may transfer either analog modem information or ISDN modem information.