Telephone exchange

H - Electricity – 04 – M

Patent

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Details

H04M 3/50 (2006.01) H04M 3/487 (2006.01) H04M 3/428 (2006.01) H04M 3/54 (2006.01)

Patent

CA 2277275

A telephone exchange transmits audible signals to a subscriber line to indicate exchange or network conditions. The audible signals to be transmitted to the subscriber line are selected (means 15) from one or more available audible signal sources (14, 16, 17, 18) according to the contents of a store location (20) for that subscriber line. Further store locations (25) are provided for each subscriber line to enable selection (means 21) of further audible signal sources (22, 23, 24) dependent upon the condition. The subscriber may alter the contents of his or her store location (20, 25) by dialling a special code. By dialling a special code the subscriber may initiate a call attempt using a predetermined series of dialled digits corresponding to the selected signal source (16, 17, 18), in response to the information heard.

Central téléphonique qui transmet des signaux audibles à un abonné pour indiquer l'état de la commutation ou du réseau. Les signaux audibles à transmettre à la ligne d'abonné sont sélectionnés (dispositif 15) dans une ou plusieurs sources (14, 16, 17, 18) de signaux audibles disponibles selon le contenu d'un point (20) de stockage pour cette ligne d'abonné. D'autres points (25) de stockage sont fournis à chaque ligne d'abonné pour permettre la sélection (dispositif 21) d'autres sources (22, 23, 24,) de signaux audibles selon l'état. L'abonné peut modifier le contenu de son ou de ses point(s) (20, 25) de stockage en composant un code spécial. En composant un code spécial, l'abonné peut procéder à une tentative d'appel à l'aide de séries prédéterminées de chiffres composés correspondant à la source (16, 17, 18) de signaux sélectionnée en réponse à l'information entendue.

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