Subscriber line automatic identification number device

Abstract

The subscriber line automatic identification number device, SLAIN device, is an apparatus that may be utilized as the subscriber's end section of a telephone privatization system. This system will not utilize any equipment available at the central office except for outside connections to the subscriber wires. As part of the Capstone Design Course of the Polytechnic University of Puerto Rico, the subscriber's end device was designed and a breadboard prototype was completed. If the complete system is to be implemented, only a computer with the correct DTMF detection devices and subscriber codes stored would be needed at the central office in order to complete the privatization system.