Importance

Loading Importance Indicators...

Abstract

A method for monitoring a condition, such as the presence of electrical power, at a remote location and for generating a telephone call on to a telephone line that delivers to a central control unit notification of a change in the monitored condition in the form of a set of unique identifying signals. According to the method, the condition is monitored at the remote location and is sensed for changes in the condition from a first state to a second state. Responsive to a change in the condition to the second state, the telephone line is tested and a line availability signal generated. Responsive to indicia of line availability, the line is selectively seized. Signals are generated on to the telephone line representative of a first telephone number to address the first control location, the signals representative the first telephone number correspond to the change in the monitored condition and signals representative of the telephone number assigned to the remote location are generated on to the telephone line by the interexchange carrier network.

Loading the Abstract Image...

First Claim