| 摘要 |
PURPOSE:To prevent tapping on a first line from being performed and to easily perform a speech with an unspecified opponent via a second line by cancelling privacy telephone on the first line on which the privacy telephone is applied, and connecting it to the second line. CONSTITUTION:When the speech is performed, outgoing by a telephone number corresponding to arbitrary privacy telephone means 721-72n in a telephone transfer privacy telephone system 7 is performed first by an automobile telephone set 1. Also, on the telephone set 1, privacy telephone means which make pairs with the means 721-72n are provided. In such a way, the telephone set 1 is connected to a radio equipment 2, a communication control unit 3, a switched line 4, a communication control unit 71, an arbitrary means out of the means 721-72n, and a communication control unit 73. At this time, a signal from the unit 71 is supplied to a talkie device 74, and a voice signal to expedite the information of connection to a privacy telephone system and the input of the telephone number of an opponent is generated, and it is supplied to the unit 73, and is supplied to the telephone set 1 in a reverse path. And when the telephone number is inputted, the signal is supplied to the device 7, and is connected to a general subscriber telephone set 8 via the line 4, the exchange of a central office, and a communication control unit 5, thereby, the speech between the telephone sets 1 and 6 can be performed. |
