FR832598A - Electrical communications systems - Google Patents

Electrical communications systems

Info

Publication number
FR832598A
FR832598A FR832598DA FR832598A FR 832598 A FR832598 A FR 832598A FR 832598D A FR832598D A FR 832598DA FR 832598 A FR832598 A FR 832598A
Authority
FR
France
Prior art keywords
communications systems
electrical communications
electrical
systems
communications
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
Other languages
French (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.)
Thales SA
Original Assignee
Le Materiel Telephonique Thomson CSF
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 Le Materiel Telephonique Thomson CSF filed Critical Le Materiel Telephonique Thomson CSF
Application granted granted Critical
Publication of FR832598A publication Critical patent/FR832598A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/42—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker
    • 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
    • H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
    • H04Q1/444—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
    • H04Q1/45—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/0016—Arrangements providing connection between exchanges

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Meter Arrangements (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Structure Of Telephone Exchanges (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)
FR832598D 1937-01-25 1938-01-24 Electrical communications systems Expired FR832598A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB255237A GB489545A (en) 1937-01-25 1937-01-25 Improvements in or relating to electrical communication systems

Publications (1)

Publication Number Publication Date
FR832598A true FR832598A (en) 1938-09-29

Family

ID=9741597

Family Applications (1)

Application Number Title Priority Date Filing Date
FR832598D Expired FR832598A (en) 1937-01-25 1938-01-24 Electrical communications systems

Country Status (3)

Country Link
DE (2) DE944196C (en)
FR (1) FR832598A (en)
GB (4) GB489609A (en)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE476047A (en) * 1939-08-16
BE447777A (en) * 1941-11-03
BE467392A (en) * 1944-05-05
US2594719A (en) * 1945-05-19 1952-04-29 Automatic Elect Lab Voice-frequency telephone signaling system
FR956493A (en) * 1946-04-15 1950-02-02
US2564378A (en) * 1946-05-06 1951-08-14 Punch Engineering Pty Ltd Carrier system signaling circuits
NL68563C (en) * 1946-06-15
US2495191A (en) * 1946-08-02 1950-01-17 Kellogg Switchboard & Supply String-of-exchanges telephone system
GB654639A (en) * 1947-02-07 1951-06-27 Standard Telephones Cables Ltd Improvements in or relating to electric signalling systems
US2579530A (en) * 1947-04-29 1951-12-25 Int Standard Electric Corp Four-wire to two-wire connecting circuit
US2566009A (en) * 1947-12-12 1951-08-28 Automatic Elect Lab Interexchange switching telephone system
GB656118A (en) * 1948-01-09 1951-08-15 Ericsson Telefon Ab L M Improvements in or relating to automatic telephone systems
US2536825A (en) * 1948-03-26 1951-01-02 Stromberg Carlson Co Multiplex telephony
US2693526A (en) * 1949-06-15 1954-11-02 Automatic Elect Lab Single channel single frequency mobile radio telephone system
US2567115A (en) * 1949-08-20 1951-09-04 Automatic Elect Lab Electronic director
GB852892A (en) * 1956-03-13 1960-11-02 Siemens Edison Swan Ltd Improvements relating to telephone systems
NL267512A (en) * 1960-07-25
CN113672424A (en) * 2021-08-19 2021-11-19 支付宝(杭州)信息技术有限公司 Method and device for repairing abnormal task

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1573991A (en) * 1924-12-17 1926-02-23 Western Electric Co Signaling system

Also Published As

Publication number Publication date
DE944196C (en) 1956-06-07
GB489755A (en) 1938-07-25
DE896667C (en) 1954-01-18
GB489609A (en) 1938-07-25
GB504237A (en) 1939-04-19
GB489545A (en) 1938-07-25

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