Telecommunications networks

H - Electricity – 04 – M

Patent

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H04M 11/00 (2006.01)

Patent

CA 2188052

In a telecommunications network comprising digital main switching units (1) and local exchanges (3), the local exchange (3) is arranged to permit alternative alert signals to consumer premises (4) by way of the local loop (5). The alternative signals may be cadenced to provide information to apparatus connected in a consumer's premises (4) without causing activation of traditional telephone, facsimile or answering machines. Such information may be supplemented by the presence or absence of a line polarity reversal before the activation signal is sent and by modulated signals, such as FSK signalling.

Dans un réseau de télécommunications comprenant des unités de commutation principales numériques (1) et des centraux locaux (3), le central local (3) est conçu de façon à permettre le déclenchement de signaux d'appel alternatifs au niveau des installations d'abonnés (4) par la ligne locale (5). Les signaux alternatifs peuvent être cadencés de façon à fournir des informations à l'appareil branché dans une installation d'abonné (4) sans déclencher le téléphone traditionnel, le télécopieur ou le répondeur. A ces informations peuvent être ajoutés la présence ou l'absence d'une inversion de polarité de ligne avant d'envoyer le signal de déclenchement, ainsi que des signaux modulés, tels que les signaux MDF.

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