Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
International Standard Electric Corp
Original Assignee
International Standard Electric Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by International Standard Electric CorpfiledCriticalInternational Standard Electric Corp
Publication of DE2139077A1publicationCriticalpatent/DE2139077A1/de
H04M3/08—Indicating faults in circuits or apparatus
H04M3/12—Marking faulty circuits "busy"; Enabling equipment to disengage itself from faulty circuits ; Using redundant circuits; Response of a circuit, apparatus or system to an error
G—PHYSICS
G04—HOROLOGY
G04G—ELECTRONIC TIME-PIECES
G04G9/00—Visual time or date indication means
G04G9/0005—Transmission of control signals
G04G9/0011—Transmission of control signals using coded signals