| 摘要 |
PURPOSE:To attain ease of restriction of a call by attaining talking only when a number coincident with a registered cipher code and a telephone number is dialed from a dial section to a ciphering storage collation section by using the ciphered registering telephone number. CONSTITUTION:When a handset section 2 is hooked off, a call request of a subscriber is given to a ciphering storage collation section 3 and a call confirming tone is returned succeedingly from the ciphering storage collation section 3 to the handset section 2. The caller dials (1) a ciphering code for registering a predetermined cipher code, and after the ciphering registration confirming tone 3 is stored. In making talking, the handset is hooked off, the ciphering code is dialed (1), and then the subscriber number is dialed (1). Only when the cipher codeand the subscriber number are coincident with the memory in the cipher storage collation section 3, the call is connected to an exchange 7 through an exchange interface section 4 and when dissident, a restricted tone is transmitted to the handset section 2. Thus, the call is regulated easily by the cipher code. |
