IT1090819B - Apaprecchiatura di linea d'abbonato per centrale telefonica - Google Patents

Apaprecchiatura di linea d'abbonato per centrale telefonica

Info

Publication number
IT1090819B
IT1090819B IT52254/77A IT5225477A IT1090819B IT 1090819 B IT1090819 B IT 1090819B IT 52254/77 A IT52254/77 A IT 52254/77A IT 5225477 A IT5225477 A IT 5225477A IT 1090819 B IT1090819 B IT 1090819B
Authority
IT
Italy
Prior art keywords
telephone unit
line apparatus
subscribe line
subscribe
telephone
Prior art date
Application number
IT52254/77A
Other languages
English (en)
Original Assignee
Jeumont Schneider
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 Jeumont Schneider filed Critical Jeumont Schneider
Application granted granted Critical
Publication of IT1090819B publication Critical patent/IT1090819B/it

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/005—Interface circuits for subscriber lines

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Devices For Supply Of Signal Current (AREA)
IT52254/77A 1976-12-17 1977-12-16 Apaprecchiatura di linea d'abbonato per centrale telefonica IT1090819B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7638031A FR2374795A1 (fr) 1976-12-17 1976-12-17 Equipement de ligne d'abonne pour central telephonique

Publications (1)

Publication Number Publication Date
IT1090819B true IT1090819B (it) 1985-06-26

Family

ID=9181173

Family Applications (1)

Application Number Title Priority Date Filing Date
IT52254/77A IT1090819B (it) 1976-12-17 1977-12-16 Apaprecchiatura di linea d'abbonato per centrale telefonica

Country Status (17)

Country Link
US (1) US4119806A (it)
JP (1) JPS5376605A (it)
AR (1) AR214764A1 (it)
AU (1) AU3149977A (it)
BE (1) BE861868A (it)
BR (1) BR7708306A (it)
DD (1) DD133387A5 (it)
DE (1) DE2754995A1 (it)
ES (1) ES464741A1 (it)
FR (1) FR2374795A1 (it)
GB (1) GB1540553A (it)
IT (1) IT1090819B (it)
LU (1) LU78693A1 (it)
NL (1) NL7713209A (it)
OA (1) OA05828A (it)
SE (1) SE7714362L (it)
ZA (1) ZA777417B (it)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5537046A (en) * 1978-09-06 1980-03-14 Nec Corp Subscriber's circuit
DE2903660C3 (de) * 1979-01-31 1981-12-10 Siemens AG, 1000 Berlin und 8000 München Belegschaltung an einer "ankommenden" c-Ader in einer Fernmeldeeinrichtung
WO1981000658A1 (en) * 1979-08-31 1981-03-05 Electro Med Eng Pty Ltd Telephone line data isolator
US4402039A (en) * 1981-09-03 1983-08-30 Bell Telephone Laboratories, Incorporated Telephone line circuit
EP0078355B1 (fr) * 1981-10-28 1985-07-31 International Business Machines Corporation Circuit d'interface comportant des moyens d'adaptation d'impédance
US4458112A (en) * 1981-10-29 1984-07-03 Telefonaktiebolaget L M Ericsson Floating subscriber loop interface circuit
US4489222A (en) * 1982-09-13 1984-12-18 The Board Of Trustees Of The Leland Stanford, Junior University Telephone line interface
US4532381A (en) * 1984-02-13 1985-07-30 Northern Telecom Limited Active impedance line feed circuit
US4805213A (en) * 1987-02-13 1989-02-14 Unison Technologies, Inc. Ring detector
US5113426A (en) * 1989-01-19 1992-05-12 Fujitsu Limited Ground fault detector

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4011410A (en) * 1973-11-13 1977-03-08 Thomas Robert M Communication system interface circuits

Also Published As

Publication number Publication date
ES464741A1 (es) 1978-09-01
DD133387A5 (de) 1978-12-27
LU78693A1 (it) 1978-04-17
US4119806A (en) 1978-10-10
NL7713209A (nl) 1978-06-20
SE7714362L (sv) 1978-06-18
GB1540553A (en) 1979-02-14
OA05828A (fr) 1981-05-31
BE861868A (fr) 1978-03-31
AU3149977A (en) 1979-06-21
AR214764A1 (es) 1979-07-31
BR7708306A (pt) 1978-09-05
FR2374795A1 (fr) 1978-07-13
DE2754995A1 (de) 1978-06-29
JPS5376605A (en) 1978-07-07
ZA777417B (en) 1978-10-25

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