STROMBERG-CARLSON CORPORATION

CENTURY 412

Business Telephone System, Principally Comprising a Switching Unit and Adjunct Controls Enabling the Switching Unit to Be Operated in Various Call Convenience Modes, and Parts Thereof;

CENTURYPHONE

Telephone Instruments and Parts Thereof;

CMAC

TELECOMMUNICATIONS SWITCHING EQUIPMENT MAINTENANCE SYSTEMS-NAMELY, CIRCUITS FOR MONITORING DIAGNOSTIC INFORMATION AT INDIVIDUAL SWITCHING UNITS, A PROCESSOR FOR CENTRALIZED PERFORMANCE OF DIAGNOSTICS AND MAINTENANCE, AND A NETWORK FOR COMMUNICATING DIAGNOSTIC AND MAINTENANCE AND CONTROL SIGNALS AMONG THE SWITCHING UNITS AND THE PROCESSOR TELEPHONE CENTRAL OFFICE LINE ASSIGNMENT SYSTEMS-NAMELY, PROCESSORS AND THEIR ASSOCIATED DATA BASES AS INDIVIDUAL SWITCHING UNITS, A PROCESSOR FOR CENTRALIZED ADMINISTRATION OF THE DATA BASES, AND A NETWORK FOR COMMUNICATION OF DATA BASE INFORMATION AMONG THE SWITCHING UNITS AND THE CENTRAL PROCESSOR AND PARTS THEREOF;