FR930147A - Telephone device or similar device - Google Patents

Telephone device or similar device

Info

Publication number
FR930147A
FR930147A FR930147DA FR930147A FR 930147 A FR930147 A FR 930147A FR 930147D A FR930147D A FR 930147DA FR 930147 A FR930147 A FR 930147A
Authority
FR
France
Prior art keywords
telephone
similar
similar device
telephone device
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.)
Automatic Electric Laboratories Inc
Original Assignee
Automatic Electric Laboratories 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 Automatic Electric Laboratories Inc filed Critical Automatic Electric Laboratories Inc
Application granted granted Critical
Publication of FR930147A publication Critical patent/FR930147A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J1/00—Frequency-division multiplex systems
    • H04J1/02—Details
    • H04J1/16—Monitoring arrangements
    • 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
    • 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
    • H04Q1/446—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency
    • H04Q1/4465—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency the same frequency being used for all signalling information, e.g. A.C. nr.9 system

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Interface Circuits In Exchanges (AREA)
FR930147D 1943-01-14 1946-07-02 Telephone device or similar device Expired FR930147A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB696/43A GB562870A (en) 1943-01-14 1943-01-14 Improvements in telephone or like systems

Publications (1)

Publication Number Publication Date
FR930147A true FR930147A (en) 1948-01-16

Family

ID=9708927

Family Applications (1)

Application Number Title Priority Date Filing Date
FR930147D Expired FR930147A (en) 1943-01-14 1946-07-02 Telephone device or similar device

Country Status (4)

Country Link
US (1) US2380232A (en)
BE (1) BE466622A (en)
FR (1) FR930147A (en)
GB (1) GB562870A (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE454346A (en) * 1943-03-08
FR952401A (en) * 1943-04-22 1949-11-16 Telecommunications Sa Device for the transmission of call and end of conversation signals over long distance telephone circuits
US2566700A (en) * 1946-10-30 1951-09-04 Rca Corp Stereoscopic and stereosonic television system
BE521897A (en) * 1952-08-03
US2972019A (en) * 1956-10-04 1961-02-14 Gen Dynamics Corp Automatic telephony ringing circuit
US3036163A (en) * 1959-05-15 1962-05-22 Bell Telephone Labor Inc Signaling system
US4517223A (en) * 1982-09-24 1985-05-14 Sovonics Solar Systems Method of making amorphous semiconductor alloys and devices using microwave energy

Also Published As

Publication number Publication date
BE466622A (en)
US2380232A (en) 1945-07-10
GB562870A (en) 1944-07-19

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