FR2456438B1 - Circuit de ligne d'abonne au telephone - Google Patents

Circuit de ligne d'abonne au telephone

Info

Publication number
FR2456438B1
FR2456438B1 FR8010452A FR8010452A FR2456438B1 FR 2456438 B1 FR2456438 B1 FR 2456438B1 FR 8010452 A FR8010452 A FR 8010452A FR 8010452 A FR8010452 A FR 8010452A FR 2456438 B1 FR2456438 B1 FR 2456438B1
Authority
FR
France
Prior art keywords
subscriber line
line circuit
telephone subscriber
telephone
circuit
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
FR8010452A
Other languages
English (en)
Other versions
FR2456438A1 (fr
Inventor
Aloysius Jozef Nijman
Franciscus Adrianus Co Schoofs
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of FR2456438A1 publication Critical patent/FR2456438A1/fr
Application granted granted Critical
Publication of FR2456438B1 publication Critical patent/FR2456438B1/fr
Expired legal-status Critical Current

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
    • H04M19/008—Using DC/DC converters

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Amplifiers (AREA)
  • Devices For Supply Of Signal Current (AREA)
FR8010452A 1979-05-10 1980-05-09 Circuit de ligne d'abonne au telephone Expired FR2456438B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7903662A NL7903662A (nl) 1979-05-10 1979-05-10 Lijncircuit.

Publications (2)

Publication Number Publication Date
FR2456438A1 FR2456438A1 (fr) 1980-12-05
FR2456438B1 true FR2456438B1 (fr) 1987-07-31

Family

ID=19833137

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8010452A Expired FR2456438B1 (fr) 1979-05-10 1980-05-09 Circuit de ligne d'abonne au telephone

Country Status (11)

Country Link
US (1) US4306122A (fr)
JP (1) JPS55156465A (fr)
AU (1) AU534278B2 (fr)
BE (1) BE883193A (fr)
CA (1) CA1159174A (fr)
DE (1) DE3017647C2 (fr)
FR (1) FR2456438B1 (fr)
GB (1) GB2050116B (fr)
IT (1) IT1193390B (fr)
NL (1) NL7903662A (fr)
SE (1) SE451170B (fr)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4315207A (en) * 1980-06-20 1982-02-09 Advanced Micro Devices, Inc. Current controlled battery feed circuit
NL8100242A (nl) * 1981-01-20 1982-08-16 Philips Nv Overspanningsbeveiliging van een lijncircuit.
US4402039A (en) * 1981-09-03 1983-08-30 Bell Telephone Laboratories, Incorporated Telephone line circuit
JPS5854773A (ja) * 1981-09-28 1983-03-31 Nec Corp 加入者回路
US4545078A (en) * 1981-11-27 1985-10-01 Siemens Aktiengesellschaft Method and arrangement for controlling a light switch for optical signals
DE3226686A1 (de) * 1982-07-16 1984-01-19 Siemens AG, 1000 Berlin und 8000 München Schaltungsanordnung zur abgabe von gleichstrom-schaltkennzeichen in einem kennzeichenumsetzer
SE433284B (sv) * 1982-09-17 1984-05-14 Ericsson Telefon Ab L M Anordning for strommatning av en abonnentapparat
SE433285B (sv) * 1982-09-22 1984-05-14 Ericsson Telefon Ab L M Anordning for strommatning av en abonnentapparat
NL8204377A (nl) * 1982-11-12 1984-06-01 Philips Nv Abonneecircuit voor een telefoonnet.
JPS59125157A (ja) * 1982-12-30 1984-07-19 Fujitsu Ltd 給電回路
US4674119A (en) * 1984-04-10 1987-06-16 Itt Corporation Wide-band high voltage amplifier for telephone exchange subscriber line interface utilizing low voltage control circuitry
US4581487A (en) * 1984-07-11 1986-04-08 Itt Corporation Universal DC feed for telephone line and trunk circuits
US4602130A (en) * 1984-10-15 1986-07-22 Itt Corporation Dual voltage source feed circuit configuration for a telephone line circuit
US5172409A (en) * 1990-07-02 1992-12-15 Motorola, Inc. Precision FET control loop
US5528688A (en) * 1994-09-28 1996-06-18 At&T Corp. Telephone battery feed circuit including noise reduction circuit
AT406812B (de) * 1996-10-02 2000-09-25 Ericsson Austria Ag Schaltungsanordnung zur fernspeisung eines teilnehmeranschlusses
US6621904B1 (en) * 1999-09-29 2003-09-16 Agere Systems Inc. Pre-charging line modem capacitors to reduce DC setup time
US6566947B2 (en) * 2000-12-26 2003-05-20 Nortel Networks Limited Combined active impedance and filter in line drivers

Family Cites Families (12)

* 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
CH586983A5 (fr) * 1974-12-23 1977-04-15 Ibm
US4004109A (en) * 1975-05-09 1977-01-18 Boxall Frank S Hybrid circuit
CH599731A5 (fr) * 1976-03-02 1978-05-31 Ibm
US4064377A (en) * 1976-03-11 1977-12-20 Wescom Switching, Inc. Electronic hybrid and hybrid repeater
US4041252A (en) * 1976-06-07 1977-08-09 North Electric Company Transformerless two-wire/four-wire hybrid with DC sourcing capability
US4037065A (en) * 1976-10-04 1977-07-19 The United States Of America As Represented By The Secretary Of The Navy 20 Hz Ringdown solid state two-wire/four-wire converter
FR2371840A1 (fr) * 1976-10-04 1978-06-16 Ibm France Circuit d'interface
GB1583635A (en) * 1977-03-02 1981-01-28 Int Standard Electric Corp Subscriber line or trunk circuit
US4203012A (en) * 1977-07-14 1980-05-13 Boxall Frank S Hybrid circuit using current mirror circuits
US4142075A (en) * 1977-10-11 1979-02-27 Burr-Brown Research Corporation Interface circuit and method for telephone extension lines
FR2442557A1 (fr) * 1978-11-22 1980-06-20 Labo Cent Telecommunicat Pont d'alimentation electronique pour ligne telephonique

Also Published As

Publication number Publication date
JPH0258830B2 (fr) 1990-12-10
SE451170B (sv) 1987-09-07
SE8003418L (sv) 1980-11-11
CA1159174A (fr) 1983-12-20
AU5812180A (en) 1980-11-13
NL7903662A (nl) 1980-11-12
DE3017647C2 (de) 1985-06-20
IT8021866A0 (it) 1980-05-07
JPS55156465A (en) 1980-12-05
GB2050116A (en) 1980-12-31
BE883193A (fr) 1980-11-10
GB2050116B (en) 1983-04-27
FR2456438A1 (fr) 1980-12-05
US4306122A (en) 1981-12-15
IT1193390B (it) 1988-06-15
DE3017647A1 (de) 1980-11-20
AU534278B2 (en) 1984-01-12

Similar Documents

Publication Publication Date Title
FR2382815B1 (fr) Joncteur de circuit telephonique ou de ligne d'abonne
FR2542548B1 (fr) Circuit d'interface de ligne telephonique
FR2456438B1 (fr) Circuit de ligne d'abonne au telephone
BE890403R (fr) Circuit de ligne de telecommunication
BR8207583A (pt) Aparelho telefonico de assinante incorporando dispositivos de protecao anti-sobretensao
FR2416600B1 (fr) Circuit de ligne telephonique
JPS57109436A (en) Subscriber's telephone set
RO84855A (fr) Circuit numerique de ligne telephonique
DK307685D0 (da) Digitalt telefonapparat
GB2007463B (en) Telephone subscriber's line circuit
PT84929A (de) Fernsprech-teilnehmerschaltung
FR2456439B1 (fr) Circuit pour ligne d'abonne
FR2296339A1 (fr) Circuit d'interface de ligne d'abonne
GB1540553A (en) Subscriber's telephone line equipment
FR2460078B1 (fr) Joncteur d'abonne electronique
GB2018093B (en) Telephone subscriber's line circuit
JPS57212853A (en) Subscriber's telephone electronic voice circuit
BE890404R (fr) Circuit de ligne telecommunication
BE890402A (fr) Circuit de ligne de telecommunication
BE876692A (fr) Circuit telephonique electronique pour ligne d'abonne
FR2498851B1 (fr) Circuit d'interface de ligne d'abonne
AR231689A1 (es) Terminal de conexion de abonado telefonico
FR2552288B1 (fr) Joncteur d'abonne telephonique
BE858262A (fr) Circuit de ligne telephonique
GB1538017A (en) Subscriber's telephone line equipment

Legal Events

Date Code Title Description
CD Change of name or company name