GB1278877A - Alarm circuit - Google Patents

Alarm circuit

Info

Publication number
GB1278877A
GB1278877A GB5621270A GB5621270A GB1278877A GB 1278877 A GB1278877 A GB 1278877A GB 5621270 A GB5621270 A GB 5621270A GB 5621270 A GB5621270 A GB 5621270A GB 1278877 A GB1278877 A GB 1278877A
Authority
GB
United Kingdom
Prior art keywords
counter
signal
resetting
circuit
stable
Prior art date
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.)
Expired
Application number
GB5621270A
Other languages
English (en)
Inventor
Fabio Balugani
Paolo Fornasiero
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.)
Italtel SpA
Original Assignee
Societa Italiana Telecomunicazioni Siemens SpA
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 Societa Italiana Telecomunicazioni Siemens SpA filed Critical Societa Italiana Telecomunicazioni Siemens SpA
Publication of GB1278877A publication Critical patent/GB1278877A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J1/00—Frequency-division multiplex systems
    • H04J1/02—Details
    • H04J1/16—Monitoring arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/20—Arrangements for detecting or preventing errors in the information received using signal quality detector
    • H04L1/206—Arrangements for detecting or preventing errors in the information received using signal quality detector for modulated signals
GB5621270A 1970-01-27 1970-11-26 Alarm circuit Expired GB1278877A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT1983070 1970-01-27

Publications (1)

Publication Number Publication Date
GB1278877A true GB1278877A (en) 1972-06-21

Family

ID=11161631

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5621270A Expired GB1278877A (en) 1970-01-27 1970-11-26 Alarm circuit

Country Status (5)

Country Link
AT (1) AT312689B (de)
CH (1) CH530136A (de)
DE (1) DE2063581C3 (de)
FR (1) FR2077343B1 (de)
GB (1) GB1278877A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0020827A1 (de) * 1979-06-15 1981-01-07 The Post Office Anordnung zum Überwachen der Funktion eines digitalen Übertragungssystemes

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3766479A (en) * 1971-10-04 1973-10-16 Ncr Carrier detection circuit
US4573040A (en) * 1979-11-30 1986-02-25 Drexelbrook Engineering Company Fail-safe instrument system
US4363030A (en) * 1979-11-30 1982-12-07 Drexelbrook Engineering Company Fail-safe instrument system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0020827A1 (de) * 1979-06-15 1981-01-07 The Post Office Anordnung zum Überwachen der Funktion eines digitalen Übertragungssystemes

Also Published As

Publication number Publication date
DE2063581A1 (de) 1971-08-05
DE2063581C3 (de) 1979-08-09
FR2077343A1 (de) 1971-10-22
FR2077343B1 (de) 1973-01-12
DE2063581B2 (de) 1978-12-07
CH530136A (it) 1972-10-31
AT312689B (de) 1974-01-10

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Legal Events

Date Code Title Description
416 Proceeding under section 16 patents act 1949
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee