ZA728424B - Improvements in or relating to telecommunications line-state monitoring circuits - Google Patents

Improvements in or relating to telecommunications line-state monitoring circuits

Info

Publication number
ZA728424B
ZA728424B ZA728424A ZA728424A ZA728424B ZA 728424 B ZA728424 B ZA 728424B ZA 728424 A ZA728424 A ZA 728424A ZA 728424 A ZA728424 A ZA 728424A ZA 728424 B ZA728424 B ZA 728424B
Authority
ZA
South Africa
Prior art keywords
relating
state monitoring
monitoring circuits
telecommunications line
telecommunications
Prior art date
Application number
ZA728424A
Other languages
English (en)
Inventor
H Blauert
F Reisch
Original Assignee
Siemens Ag
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 Siemens Ag filed Critical Siemens Ag
Publication of ZA728424B publication Critical patent/ZA728424B/xx

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H04L43/16—Threshold monitoring

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Electronic Switches (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Emergency Protection Circuit Devices (AREA)
ZA728424A 1972-01-24 1972-11-28 Improvements in or relating to telecommunications line-state monitoring circuits ZA728424B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2203180A DE2203180C3 (de) 1972-01-24 1972-01-24 Verbindungsüberwachungsschaltung

Publications (1)

Publication Number Publication Date
ZA728424B true ZA728424B (en) 1973-08-29

Family

ID=5833832

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA728424A ZA728424B (en) 1972-01-24 1972-11-28 Improvements in or relating to telecommunications line-state monitoring circuits

Country Status (15)

Country Link
US (1) US3887824A (pt)
AR (1) AR194976A1 (pt)
AT (1) AT320751B (pt)
BE (1) BE793396A (pt)
BR (1) BR7300519D0 (pt)
CH (1) CH546522A (pt)
DE (1) DE2203180C3 (pt)
DK (1) DK140915C (pt)
FR (1) FR2169038B1 (pt)
GB (1) GB1405154A (pt)
IT (1) IT978365B (pt)
LU (1) LU66874A1 (pt)
NL (1) NL7300534A (pt)
SE (1) SE376705B (pt)
ZA (1) ZA728424B (pt)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4037050A (en) * 1976-05-26 1977-07-19 Bell Telephone Laboratories, Incorporated Fault isolation in communications circuits
US4084070A (en) * 1977-01-21 1978-04-11 Rca Corporation Overcurrent protection circuit
DE4212742A1 (de) * 1992-04-16 1993-10-21 Bayerische Motoren Werke Ag Verfahren zur Fehlererkennung bei einem Datenbus
FR2787584B1 (fr) * 1998-12-18 2001-02-09 Atral Dispositif de detection de coupure d'une ligne electrique, en particulier d'une ligne telephonique
US6587050B2 (en) 2001-07-24 2003-07-01 Eaton Corporation Oscillator activated continuity testing switch
US6653846B2 (en) 2001-09-14 2003-11-25 Eaton Corporation Multifunction circuit continuity and sensor tester

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2949547A (en) * 1958-06-13 1960-08-16 Bell Telephone Labor Inc Delay timer
BE620605A (pt) * 1961-03-07
US3317668A (en) * 1963-08-15 1967-05-02 Teletype Corp Open line and busy line detection circuit
US3275850A (en) * 1964-02-11 1966-09-27 Itt Timer
US3354323A (en) * 1964-11-27 1967-11-21 Test Corp Comp Pulse generator with direct connection to output pulse former and time delay in branch circuit
US3414735A (en) * 1965-12-03 1968-12-03 Conductron Corp Variable time constant learning means
DE1614530C2 (de) * 1967-05-23 1975-11-27 Siemens Ag, 1000 Berlin Und 8000 Muenchen Schaltungsanordnung zur zeitabhängigen Steuerung von Relais
FR1605049A (pt) * 1968-12-31 1972-08-28

Also Published As

Publication number Publication date
FR2169038A1 (pt) 1973-09-07
CH546522A (de) 1974-02-28
AR194976A1 (es) 1973-08-30
AT320751B (de) 1975-02-25
FR2169038B1 (pt) 1977-07-22
DK140915C (da) 1980-05-19
LU66874A1 (pt) 1973-07-27
US3887824A (en) 1975-06-03
DK140915B (da) 1979-12-03
NL7300534A (pt) 1973-07-26
BE793396A (fr) 1973-06-28
IT978365B (it) 1974-09-20
GB1405154A (en) 1975-09-03
SE376705B (pt) 1975-06-02
DE2203180B2 (de) 1974-11-14
BR7300519D0 (pt) 1973-09-20
DE2203180A1 (de) 1973-08-09
DE2203180C3 (de) 1975-06-26

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