Visual identification of called and calling numbers - is initiated by subscriber equipment and transmitted directly over connecting telephone line

摘要: The object is to provide reciprocal identification of called and calling numbers, these data being visually displayed on part the subscriber equipment. It serves identify both caller called. A can then check that number selected in fact which he has been connected. number. necessary transmission its control initiation set up by digital circuitry, typically use a microprocessor. When receiver lifted an identifying signal transmitter activated passes appropriate code where it translated into display. Receipt this starts caller's results identity at instrument. To assist eliminating errors, counteract deliberate deception, respective numbers be regenerated intervals during connection.