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CONST TELEPHONIQUES SOC NOUV
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CONST TELEPHONIQUES SOC NOUV
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Publication of FR972655ApublicationCriticalpatent/FR972655A/fr
H04M9/00—Arrangements for interconnection not involving centralised switching
H04M9/002—Arrangements for interconnection not involving centralised switching with subscriber controlled access to a line, i.e. key telephone systems
H04M9/005—Arrangements for interconnection not involving centralised switching with subscriber controlled access to a line, i.e. key telephone systems with subscriber controlled access to an exchange line
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Engineering & Computer Science
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Signal Processing
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FR972655D1948-08-281948-08-28Dispositif de sectionnement pour installations de télécommande électrique
ExpiredFR972655A
(fr)