Title: Installation for time multiplexing and transmitting telephone signals or data between a plurality of subscribers

Abstract: An installation for transmitting telephone signals or data with time multiplexing for a plurality of subscriber sets divided into a number of groups. At least one pair of multiplexing gates actuated in synchronism are employed for each group, one for transmission and the other for reception. There is included at least one time multiplex connection, and at least one pair of first supplementary gates, respectively inserted between the multiplex connection and the transmission and reception gates connected to the subscriber sets in each single group. The first supplementary gates are actuated in synchronism with the corresponding transmission and reception gates. In the event of a fault in the transmission gate or reception gate connected to a subscriber set, the corresponding first supplementary gate is kept closed for the duration of the fault, thereby isolating the group; the remainder of the system is permitted to operate.

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Inventors: Prudhon, Lucien P. E. (Soisy-sur-Seine, FR)
Charil, Jean P. G. (Clamart, FR)

Application Number: 749620
Filing Date: 1976-12-13
Publication_date: 1979-05-01
Assignee: Association des Ouvriers en Instruments de Precision (Paris, FR)
Primary Class(es): 370/242 370/503, 370/537
Other Classes:
US Patent Ref:

3427475	Feb, 1969	Wilkenson	179/15.
3624304	Nov, 1971	Formenti	179/15.
3683115	Aug, 1972	Schellenberg	179/15.
3787628	Jan, 1974	Van Dijk	179/15.
3922493	Nov, 1975	Brenig	179/15.
4009348	Feb, 1977	Tate	179/15.
4017687	Apr, 1977	Hartzler	179/15.
4021618	May, 1977	Wurst	179/18.

Other Refs:
Primary Examiner: Stewart, David L.
Assistant Examiner:
Attorney: Cooper, Dunham, Clark, Griffin & Moran