| 摘要 |
The device according to the invention includes an incoming call filtering which consists of a recognition logic unit 2 which, following an automatic line seizure 3, via the subscriber socket 1, informs the caller through speech synthesis 4 of the possibility of giving his confidential code, which, when compared with the code displayed by the called party on coding wheels 6 and after coincidence, triggers the ringing generator 7, picks up the line by virtue of the electronic switching stage 10 and connects the called set 11 in order to establish the communication. The invention applies to the telephone. <IMAGE>
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