| 摘要 |
PURPOSE:To form a great number of secretary telephones with just a single automatic exchange, by assigning the function of a secretary telephone to an ordinary extension telephone by setting a data. CONSTITUTION:When the dialing is given from a telephone 1C, the dial information is transmitted to a control part 6 via a subscriber circuit 2 and decoded. The part 6 reads the data on a secretary telephone number to check the destination, of connection out of a memory part 4 and checks it. In case the dialed number of telephone is a telephone A, and the telephones 1A and 1B function as a primary telephone and a secondary telephone, respectively are cleared. Thus the part 6 switches the call to the telephone 1B. As a result, the telephones 1B and 1C are set in the calling state. Then the call is transferred to the telephone 1A from 1B, therefore, the telephones 1A and 1C are set in the calling state. Thus a busy tone is transmitted to the telephone 1B. In this case, the part 6 has no connection control even through the telephone 1B tries to transmit to the telephone 1A. |
