ZA777417B - Subscriber's line equipment for a telephone exchange - Google Patents

Subscriber's line equipment for a telephone exchange

Info

Publication number
ZA777417B
ZA777417B ZA00777417A ZA777417A ZA777417B ZA 777417 B ZA777417 B ZA 777417B ZA 00777417 A ZA00777417 A ZA 00777417A ZA 777417 A ZA777417 A ZA 777417A ZA 777417 B ZA777417 B ZA 777417B
Authority
ZA
South Africa
Prior art keywords
subscriber
telephone exchange
line equipment
equipment
line
Prior art date
Application number
ZA00777417A
Other languages
English (en)
Inventor
A Baratin
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
Publication of ZA777417B publication Critical patent/ZA777417B/xx

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)
ZA00777417A 1976-12-17 1977-12-13 Subscriber's line equipment for a telephone exchange ZA777417B (en)

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
ZA777417B true ZA777417B (en) 1978-10-25

Family

ID=9181173

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA00777417A ZA777417B (en) 1976-12-17 1977-12-13 Subscriber's line equipment for a telephone exchange

Country Status (17)

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

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 (xx) 1978-04-17
IT1090819B (it) 1985-06-26
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

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