ZA801684B - A subscriber connection circuit for an exchange of a telecommunications system - Google Patents

A subscriber connection circuit for an exchange of a telecommunications system

Info

Publication number
ZA801684B
ZA801684B ZA00801684A ZA801684A ZA801684B ZA 801684 B ZA801684 B ZA 801684B ZA 00801684 A ZA00801684 A ZA 00801684A ZA 801684 A ZA801684 A ZA 801684A ZA 801684 B ZA801684 B ZA 801684B
Authority
ZA
South Africa
Prior art keywords
wire
resistor
circuit
subscriber line
telecommunications system
Prior art date
Application number
ZA00801684A
Other languages
English (en)
Inventor
R Lechner
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 ZA801684B publication Critical patent/ZA801684B/xx

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/001—Current supply source at the exchanger providing current to substations
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/22—Arrangements for supervision, monitoring or testing
    • H04M3/26—Arrangements for supervision, monitoring or testing with means for applying test signals or for measuring
    • H04M3/28—Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor
    • H04M3/30—Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor for subscriber's lines, for the local loop
    • 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)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Luminescent Compositions (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Saccharide Compounds (AREA)
  • Exchange Systems With Centralized Control (AREA)
  • Telephonic Communication Services (AREA)
ZA00801684A 1979-03-23 1980-03-21 A subscriber connection circuit for an exchange of a telecommunications system ZA801684B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2911517A DE2911517C2 (de) 1979-03-23 1979-03-23 Teilnehmeranschlußschaltung mit Erdtasten- und Isolationsfehlerindikation

Publications (1)

Publication Number Publication Date
ZA801684B true ZA801684B (en) 1981-03-25

Family

ID=6066265

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA00801684A ZA801684B (en) 1979-03-23 1980-03-21 A subscriber connection circuit for an exchange of a telecommunications system

Country Status (7)

Country Link
US (1) US4301334A (ja)
EP (1) EP0017763B1 (ja)
JP (1) JPS55128995A (ja)
AT (1) ATE3801T1 (ja)
DE (2) DE2911517C2 (ja)
FI (1) FI74858C (ja)
ZA (1) ZA801684B (ja)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2911584C2 (de) * 1979-03-23 1981-06-11 Siemens AG, 1000 Berlin und 8000 München Teilnehmeranschlußschaltung mit Erdtastenbetätigungsindikation, hochohmig schaltbarer Speisung und Einrichtung zur Rufsignalerzeugung
DE3035287A1 (de) * 1980-09-18 1982-04-22 Siemens AG, 1000 Berlin und 8000 München Teilnehmeranschlussschaltung
FR2501940B1 (fr) * 1981-03-11 1985-07-19 Trt Telecom Radio Electr Detecteur de boucle peu sensible aux tensions longitudinales
FR2502434A1 (fr) * 1981-03-20 1982-09-24 Trt Telecom Radio Electr Circuit pour reduire la consommation dans un equipement de ligne d'abonne en cas de faux appel
DE3207318A1 (de) * 1982-03-01 1983-09-08 Siemens AG, 1000 Berlin und 8000 München Teilnehmeranschlussschaltung mit niederohmig ueberbrueckbaren speisewiderstaenden und einer unterschiedliche indikationen durchfuehrenden indikationsschaltung
DE3235085A1 (de) * 1982-09-22 1984-03-22 Siemens AG, 1000 Berlin und 8000 München Schleifenstromeinspeisung fuer einen kennzeichenumsetzer
US4593156A (en) * 1984-05-18 1986-06-03 Itt Corporation Grounded tip detector
DE3433330A1 (de) * 1984-09-11 1986-03-20 Siemens AG, 1000 Berlin und 8000 München Schaltungsanordnung zur indikation der erdung einer ader einer teilnehmerleitung bei erdtastendruck
DE3541546A1 (de) * 1985-11-25 1987-05-27 Ant Nachrichtentech Anordnung zur realisierung einer erdtastenfunktion
US5113426A (en) * 1989-01-19 1992-05-12 Fujitsu Limited Ground fault detector
GB9104133D0 (en) * 1991-02-27 1991-04-17 Plessey Telecomm Remote line test facility
US7340051B2 (en) * 2003-05-30 2008-03-04 Adc Dsl Systems, Inc. Power ramp-up in a line-powered network element system
DE202006006221U1 (de) * 2006-04-13 2006-07-06 Lincoln Gmbh & Co. Kg Förderpumpe und Dichtungsanordnung hierfür
DE102022100351A1 (de) 2022-01-10 2023-07-13 Phoenix Contact Gmbh & Co. Kg Steckverbinder mit einer Einrichtung zur Detektion eines Kriechstroms, Anordnung zur Ausbildung einer Steckverbindung und Verfahren zur Detektion eines Kriechstroms in einem Steckverbinder

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3121775A (en) * 1959-12-23 1964-02-18 Bell Telephone Labor Inc Line insulation testing in telephone systems
GB1236897A (en) * 1969-06-18 1971-06-23 Sits Soc It Telecom Siemens Improvements in or relating to compensating circuits
US3715511A (en) * 1969-09-24 1973-02-06 Stromberg Carlson Corp Telephone pulsing circuit
DE2520975C3 (de) * 1975-05-10 1980-06-12 Elmeg Elektro-Mechanik Gmbh, 3150 Peine Schaltungsanordnung zum Erfassen von Schleifenzuständen in Fernsprechanlagen
DE2547880C2 (de) * 1975-10-25 1981-09-24 Standard Elektrik Lorenz Ag, 7000 Stuttgart Schaltungsanordnung zur Erkennung von Betriebszuständen einer Teilnehmerleitung und zur Rufanschaltung sowie Rufabschaltung in Fernsprechvermittlungsanlagen

Also Published As

Publication number Publication date
FI74858B (fi) 1987-11-30
DE2911517B1 (de) 1980-09-11
DE3063730D1 (en) 1983-07-21
DE2911517C2 (de) 1981-07-09
ATE3801T1 (de) 1983-06-15
FI74858C (fi) 1988-03-10
JPS55128995A (en) 1980-10-06
FI800891A (fi) 1980-09-24
US4301334A (en) 1981-11-17
EP0017763A1 (de) 1980-10-29
EP0017763B1 (de) 1983-06-15
JPS646598B2 (ja) 1989-02-03

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