FR980088A - Système de signalisation à fréquence vocale - Google Patents

Système de signalisation à fréquence vocale

Info

Publication number
FR980088A
FR980088A FR980088DA FR980088A FR 980088 A FR980088 A FR 980088A FR 980088D A FR980088D A FR 980088DA FR 980088 A FR980088 A FR 980088A
Authority
FR
France
Prior art keywords
signaling system
voice frequency
frequency signaling
voice
signaling
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
English (en)
Inventor
Victor John Terry
Thomas Frederick St Hargreaves
William Frederick Gould
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.)
International Standard Electric Corp
Original Assignee
International Standard Electric Corp
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 International Standard Electric Corp filed Critical International Standard Electric Corp
Application granted granted Critical
Publication of FR980088A publication Critical patent/FR980088A/fr
Expired legal-status Critical Current

Links

Classifications

    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Noise Elimination (AREA)
  • Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
FR980088D 1947-07-09 1948-12-09 Système de signalisation à fréquence vocale Expired FR980088A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB18161/47A GB651464A (en) 1947-07-09 1947-07-09 Improvements in or relating to voice frequency signalling receivers

Publications (1)

Publication Number Publication Date
FR980088A true FR980088A (fr) 1951-05-08

Family

ID=10107688

Family Applications (1)

Application Number Title Priority Date Filing Date
FR980088D Expired FR980088A (fr) 1947-07-09 1948-12-09 Système de signalisation à fréquence vocale

Country Status (6)

Country Link
US (1) US2572074A (fr)
BE (1) BE486300A (fr)
CH (1) CH268995A (fr)
FR (1) FR980088A (fr)
GB (1) GB651464A (fr)
NL (1) NL75784C (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2677014A (en) * 1950-06-29 1954-04-27 Westinghouse Electric Corp Tone-shift carrier
US2817828A (en) * 1953-10-07 1957-12-24 Bell Telephone Labor Inc Multifrequency high speed signaling system employing pulses of signaling currents ofpredetermined duration based on orthogonal functions
US2913711A (en) * 1954-10-15 1959-11-17 Itt Signal control system
US2779935A (en) * 1955-03-21 1957-01-29 Holmes Electric Protective Com Noise actuated disabling unit
US3124658A (en) * 1958-02-28 1964-03-10 Input
US3204045A (en) * 1962-10-30 1965-08-31 Collins Radio Co Automatic ring thru system
FR2506544A1 (fr) * 1981-05-19 1982-11-26 Jeumont Schneider Procede de determination de l'etat d'un signal alternatif module en tout ou rien en milieu perturbe

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE431048A (fr) * 1937-11-12
US2255190A (en) * 1939-02-18 1941-09-09 Ryall Leonard Ernest Variable amplifying device
US2282131A (en) * 1940-01-12 1942-05-05 Associated Electric Lab Inc Electrical signaling system

Also Published As

Publication number Publication date
BE486300A (fr)
CH268995A (de) 1950-06-15
US2572074A (en) 1951-10-23
GB651464A (en) 1951-04-04
NL75784C (fr)

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