QUIKTEL

ELECTRONIC TELEPHONE CALL PROCESSING SYSTEMS CONSISTING OF A CENTRAL MESSAGE PROCESSING UNIT WITH KEYBOARD AND DISPLAY OPERABLE TO GENERATE MESSAGES REGARDING INCOMING TELEPHONE CALLS, ONE OR MORE REMOTE PROCESSING UNITS HAVING A DISPLAY FOR DISPLAYING MESSAGES REGARDING INCOMING CALLS RECEIVED FROM THE CENTRAL UNIT AND HAVING MANUALLY-OPERABLE SWITCHES PERMITTING TRANSMISSION OF INSTRUCTIONS REGARDING HANDLING OF TELEPHONE CALLS AND RETRIEVAL OF STORED MESSAGES, AND CIRCUITRY FOR ROUTING MESSAGES BETWEEN THE CENTRAL MESSAGE PROCESSING UNIT AND THE REMOTE PROCESSING UNITS; COMPONENTS FOR EXPANSION OF SUCH SYSTEMS, NAMELY, CENTRAL MESSAGE PROCESSING UNITS AS DESCRIBED ABOVE, REMOTE PROCESSING UNITS AS DESCRIBED ABOVE, AND MESSAGE ROUTING CIRCUITRY ADAPTED TO EXPAND THE NUMBER OF REMOTE UNITS SERVED BY A CENTRAL MESSAGE PROCESSING UNIT