IE810880L - Loop signalling circuit - Google Patents

Loop signalling circuit

Info

Publication number
IE810880L
IE810880L IE810880A IE88081A IE810880L IE 810880 L IE810880 L IE 810880L IE 810880 A IE810880 A IE 810880A IE 88081 A IE88081 A IE 88081A IE 810880 L IE810880 L IE 810880L
Authority
IE
Ireland
Prior art keywords
circuit
opto
oct1
coupler
signalling circuit
Prior art date
Application number
IE810880A
Other versions
IE51864B1 (en
Original Assignee
Plessey Co Plc
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 Plessey Co Plc filed Critical Plessey Co Plc
Publication of IE810880L publication Critical patent/IE810880L/en
Publication of IE51864B1 publication Critical patent/IE51864B1/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details
    • H04Q1/30—Signalling arrangements; Manipulation of signalling currents
    • H04Q1/38—Signalling arrangements; Manipulation of signalling currents using combinations of direct currents of different amplitudes or polarities over line conductors or combination of line conductors

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)
  • Regulation And Control Of Combustion (AREA)
  • Photoreceptors In Electrophotography (AREA)

Abstract

Electronic SVI/CNI DC loop signalling circuit uses opto-couplers OCT1- OCT4 to provide the polarised relay functions of the known Strowger circuit. The circuit has one opto-coupler OCT1 which continuously conducts during the idle state of the circuit. The opto- coupler also automatically busies the circuit under fault conditions. <IMAGE> [GB2074813A]
IE880/81A 1980-04-19 1981-04-16 Electronic telecommunications dc loop signalling circuit IE51864B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8012962A GB2074813B (en) 1980-04-19 1980-04-19 Loop detectors

Publications (2)

Publication Number Publication Date
IE810880L true IE810880L (en) 1981-10-19
IE51864B1 IE51864B1 (en) 1987-04-15

Family

ID=10512890

Family Applications (1)

Application Number Title Priority Date Filing Date
IE880/81A IE51864B1 (en) 1980-04-19 1981-04-16 Electronic telecommunications dc loop signalling circuit

Country Status (5)

Country Link
GB (1) GB2074813B (en)
IE (1) IE51864B1 (en)
NZ (1) NZ196834A (en)
PT (1) PT72845B (en)
ZA (1) ZA812051B (en)

Also Published As

Publication number Publication date
GB2074813B (en) 1984-04-18
PT72845A (en) 1981-05-01
NZ196834A (en) 1984-03-16
IE51864B1 (en) 1987-04-15
PT72845B (en) 1982-06-01
GB2074813A (en) 1981-11-04
ZA812051B (en) 1982-04-28

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