TELEPHONE SYSTEM CAPABLE OF LEARNING TRANSMISSION TELEPHONE SET NUMBER

摘要

PURPOSE:To know a transmission telephone set number in a receiving telephone set by providing a telephone set number transmitter to an exchange station at transmission side. CONSTITUTION:In dialing a telephone set 1 at transmission side, the dialing information is connected to a telephone set 7 via exchanges 4, 10 and a telephone set number transmitter 6 is operated via a leading wire 5. The transmitter 6 transmits an identification code representing the telephone set number of the telephone set 1 to a telephone set number receiver 12 in an exchange station 9 at receiving side. The receiver 12 informs the telephone set number of the transmission telephone set 1 to a recipient to the receiving telephone set 7 through a leading wire 11 by voice or display.