Reseau et installation telephoniques d'appels collectifs a fonctionnement selectif

Selective operation multi-party call telephone equipment and network


Systeme d'appels collectifs, installations et reseaux telephoniques industriels et d'abonnes, ou les appels ou trafic entre les sous-stations individuelles s'effectuent sans le central telephonique, et de plus, le trafic du centre de transit des sous-stations individuelles des reseaux collectifs est egalement realise. Le point de commande du commutateur commande, si le systeme est monte entre la ligne collective et les appareils de telephone des stations individuelles, est interconnecte a une memoire ayant son propre code. Les sous-stations sont connectees a la ligne collective dans un etat du commutateur commande, et il est deconnecte de la ligne dans l'autre etat. Le mode de realisation du reseau telephonique de l'invention pour un fonctionnement alternativement ouvert ou selectif, possede une memoire a double codes dans toutes les sous-stations individuelles.
Multi-party call system service, industrial and subscriber's telephone equipment and network, where the traffic between the individual substations is realized without the central telephone exchange, furthermore, the through exchange traffic of individual substations of the multi-party networks is realized as well. The controlled switch if the system is inserted between the multi-party line and the telephone sets of the individual stations the control point of the switch is interconnected with the proper code memory. The substations are connected to the multi-party line in one state of the controlled switch, and it is switched off the line in the other. The service version of the telephone network, provided by the invention for alternatively selective or open operation, has doubled proper code memory in all individual substations.




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Patent Citations (2)

    Publication numberPublication dateAssigneeTitle
    DE-2607493-A1September 01, 1977Siemens AgRailway signals monitoring telephone system - allows incoming emergency calls to be identified at command stations
    FR-2285775-A1April 16, 1976Berna GuyIntercommunication system with selective calling - uses codes signals to alert slave stations branched from common line

NO-Patent Citations (1)

    V.M. Volkov et al: "Telefoniya", published 1967, "Transport", Moscow, p. 300-301, fig. 241-242

Cited By (2)

    Publication numberPublication dateAssigneeTitle
    EP-0129843-A2January 02, 1985Alcatel N.V.Adaptateur de ligne pour ligne partagée assurant le secret
    EP-0129843-A3April 20, 1988Alcatel N.V.Multiparty line adaptor with privacy feature