Emergency call system in uncontrolled telephone centers. (Machine-translation by Google Translate, not legally binding)

摘要

SYSTEM OF EMERGENCY CALLS IN AUTOMATIC TELEPHONE STATIONS NOT ATTENDED, THAT ALLOWS CERTAIN LINES OF SUBSCRIBERS TO PERFORM AS SUBSCRIBERS TO THE CENTER OF HIGHER RANGE WHEN THEIR OWN SWITCHING EQUIPMENT IS DISABLED TO TAKE. IT CONSISTS OF A LOCAL FUNCTIONAL UNIT THAT INCLUDES AN ALARM DETECTOR (DA), A SWITCH (C1), A MARKING DISCRIMINATOR (DM), A LOCAL DETECTOR OF END OF SELECTIONS, AN AVAILABILITY DETECTOR (DO), A SIGNALING SIMULATOR LOCAL, A SWITCH (C2) AND A LOCAL SET RECEIVER; AND OF A DISTANT FUNCTIONAL UNIT THAT INCLUDES A SOCKET DETECTOR (DT), A SWITCH (C3), A DISTANT DETECTOR OF END OF SELECTIONS, A DISTANT SIGNALING SIMULATOR AND A DISTANT COMPUTER RECEIVER. (Machine-translation by Google Translate, not legally binding)