FR2352457A1 - Circuit d'interface a couplage optique pour lignes telephoniques - Google Patents

Circuit d'interface a couplage optique pour lignes telephoniques

Info

Publication number
FR2352457A1
FR2352457A1 FR7715078A FR7715078A FR2352457A1 FR 2352457 A1 FR2352457 A1 FR 2352457A1 FR 7715078 A FR7715078 A FR 7715078A FR 7715078 A FR7715078 A FR 7715078A FR 2352457 A1 FR2352457 A1 FR 2352457A1
Authority
FR
France
Prior art keywords
interface circuit
telephone lines
coupling interface
optically coupling
optically
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.)
Granted
Application number
FR7715078A
Other languages
English (en)
Other versions
FR2352457B1 (fr
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.)
AT&T Corp
Original Assignee
Western Electric Co Inc
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 Western Electric Co Inc filed Critical Western Electric Co Inc
Publication of FR2352457A1 publication Critical patent/FR2352457A1/fr
Application granted granted Critical
Publication of FR2352457B1 publication Critical patent/FR2352457B1/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/42—Systems providing special services or facilities to subscribers
    • H04M3/56—Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/40—Applications of speech amplifiers

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Telephonic Communication Services (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Use Of Switch Circuits For Exchanges And Methods Of Control Of Multiplex Exchanges (AREA)
FR7715078A 1976-05-21 1977-05-17 Circuit d'interface a couplage optique pour lignes telephoniques Granted FR2352457A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/688,787 US4045615A (en) 1976-05-21 1976-05-21 Monobus interface circuit using opto-coupled hybrids

Publications (2)

Publication Number Publication Date
FR2352457A1 true FR2352457A1 (fr) 1977-12-16
FR2352457B1 FR2352457B1 (fr) 1981-08-28

Family

ID=24765770

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7715078A Granted FR2352457A1 (fr) 1976-05-21 1977-05-17 Circuit d'interface a couplage optique pour lignes telephoniques

Country Status (9)

Country Link
US (1) US4045615A (fr)
JP (1) JPS52142911A (fr)
CA (1) CA1070035A (fr)
CH (1) CH617052A5 (fr)
DE (1) DE2722894C3 (fr)
FR (1) FR2352457A1 (fr)
GB (1) GB1563658A (fr)
NL (1) NL7705398A (fr)
SE (1) SE429490B (fr)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4109113A (en) * 1977-10-31 1978-08-22 Bell Telephone Laboratories, Incorporated Communication system optimized pooled line arrangement
US4190747A (en) * 1978-04-05 1980-02-26 Bell Telephone Laboratories, Incorporated Signal corrected optocoupled device
US4228323A (en) * 1979-01-31 1980-10-14 Bell Telephone Laboratories, Incorporated Variable loop length compensated barrier circuit
US4479066A (en) * 1980-03-28 1984-10-23 At&T Bell Laboratories AC/DC Current divider circuit
SE430197B (sv) * 1982-02-09 1983-10-24 Ellemtel Utvecklings Ab Elektroniskt externlinjeoverdrag
US4817204A (en) * 1987-01-29 1989-03-28 Process Systems, Inc. Optical communication apparatus and method for telephone supervisory and audio signals
ES2059221B1 (es) * 1991-04-18 1995-05-01 Aplicaciones Electronicas Quas Sistema de multiconferencia.
WO1994003990A1 (fr) * 1992-08-07 1994-02-17 Pascom Technologies Pty. Ltd. Dispositif d'interface et d'isolation
US5734703A (en) * 1993-05-26 1998-03-31 Hitachi Maxell, Ltd. Hybrid circuit and data communication apparatus
DE19503164A1 (de) * 1994-02-04 1995-08-10 Siemens Comp Inc Optisch gekoppelte Datenanschalteanordnung und Gabelschaltung
US6169801B1 (en) 1998-03-16 2001-01-02 Midcom, Inc. Digital isolation apparatus and method
KR100445221B1 (ko) * 2002-04-16 2004-08-21 덕성엠앤피 주식회사 다단 분리형 상형금형을 갖는 금형장치

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3772514A (en) * 1971-11-08 1973-11-13 Capintec Inc Isolation amplifier
US3824344A (en) * 1973-03-22 1974-07-16 Bell Telephone Labor Inc Conference bridge circuit
US3882276A (en) * 1974-03-22 1975-05-06 Bell Telephone Labor Inc Conferencing system utilizing oppositely phased hybrids
US3991279A (en) * 1975-05-23 1976-11-09 Bell Telephone Laboratories, Incorporated Monobus interface circuit

Also Published As

Publication number Publication date
DE2722894B2 (de) 1980-10-16
CA1070035A (fr) 1980-01-15
FR2352457B1 (fr) 1981-08-28
GB1563658A (en) 1980-03-26
SE429490B (sv) 1983-09-05
US4045615A (en) 1977-08-30
DE2722894C3 (de) 1981-08-27
JPS52142911A (en) 1977-11-29
CH617052A5 (fr) 1980-04-30
JPS5748913B2 (fr) 1982-10-19
DE2722894A1 (de) 1977-12-01
SE7705441L (sv) 1977-11-22
NL7705398A (nl) 1977-11-23

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Legal Events

Date Code Title Description
ST Notification of lapse