UTILITY METER READING SYSTEMS; UTILITY METER READING EQUIPMENT; UTILITY METER READING DATA TRANSMITTING AND RECORDING EQUIPMENT; AND COMPONENTS THEREFOR UTILIZING ENCODER AND TRANSPONDER AT THE METER, A LINE COUPLER AT THE CUSTOMER'S TELEPHONE TERMINAL BLOCK; COUPLING DEVICE AT A TELEPHONE CENTRAL OFFICE AND MASTER CONTROL AND DATA STATION REMOTE FROM SAID METER AND DEVICE TO CONTROL THE SAME