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Application filed by Ericsson Telefon Ab L MfiledCriticalEricsson Telefon Ab L M
Publication of DK54479ApublicationCriticalpatent/DK54479A/en
Publication of DK147748BpublicationCriticalpatent/DK147748B/en
Application grantedgrantedCritical
Publication of DK147748CpublicationCriticalpatent/DK147748C/en
H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
H04M11/04—Telephonic communication systems specially adapted for combination with other electrical systems with alarm systems, e.g. fire, police or burglar alarm systems
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Engineering & Computer Science (AREA)
Signal Processing (AREA)
Alarm Systems (AREA)
Telephonic Communication Services (AREA)
DK54479A1978-02-101979-02-09 ALARM SYSTEMS INCLUDING A NUMBER OF SUBSCRIBER DEVICES AND AN ALARM CENTER FOR OPERATING THESEDK147748C (en)
SET FOR IN A TELECOMMUNICATION SYSTEM IF CALL TO NIGHT COUPLE JOURCENTRAL OR JOURCENTRAL FROM OPERATION ASTADKOMMA AUTOMATIC CONVERSION TO ANOTHER JOURCENTRAL AND DEVICE FOR IMPLEMENTATION OF THE SET