Abstract: A combination of fixed frequency audio tones and conventional dual tones (as generated by a DTMF telephone set), are used in the autoline control circuit of the invention. All tones are generated by the DTMF telephone set to systematically provide functions available to the subscriber without need for quad conductors in the in-house telephone line and mechanical disconnects. Low cost integration of the present invention into existing FCC tarriffed DTMF equipment and systems without adverse effects is a paramount requirement as the above-mentioned functions are carried out. Conventional jacks and plugs are used to place the parallel autoline circuit of the invention in parallel with the DTMF telephones and the conventional in-premises line connector.

Abstract: A submetering apparatus that includes a power supply unit, an apartment monitoring unit, a main meter monitoring unit, a power failure detection unit, a power failure protection unit, a main processing unit and a memory unit. The apparatus further includes a display unit, a modem unit, a terminal unit, a control switch unit and a memory module unit. These units interact to allow the apparatus to monitor furnace on-time for individual apartment units and to store that data until needed and to calculate appropriate billing statements.