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Application filed by Сьбирателно Дружество "Еlта-R"filedCriticalСьбирателно Дружество "Еlта-R"
Priority to BG101766ApriorityCriticalpatent/BG101766A/en
Publication of BG101766ApublicationCriticalpatent/BG101766A/en
The device can be used in communications engineering. By itthe connection of two duplex subscribers to two direct linesubscribers of the telephone exchange on one two-wire line becomespossible in case the telephone exchange has free capacity but hasno cable laid to the subscriber. By the device (3) two subscribers(7) are connected across a duplex box (5) to two direct linesubscriber sets (1) on a two-wire line (4).1 claim, 1 figure
BG101766A1997-07-071997-07-07Matching device for a subscriber line
BG101766A
(en)
Process and device for transmitting confidential connection establishment and service information between subscriber terminals and one or more digital exchanges
SWITCHING EQUIPMENT FOR AN INTERNAL TELEPHONE COMMUNICATION INSTALLATION, A DUPLEX INTERCOMMUNICATION INSTALLATION OR A KEY-CONTROLLED LOUDSPEAKER CALL INSTALLATION