FR2124484A1 - - Google Patents

Info

Publication number
FR2124484A1
FR2124484A1 FR7203789A FR7203789A FR2124484A1 FR 2124484 A1 FR2124484 A1 FR 2124484A1 FR 7203789 A FR7203789 A FR 7203789A FR 7203789 A FR7203789 A FR 7203789A FR 2124484 A1 FR2124484 A1 FR 2124484A1
Authority
FR
France
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
FR7203789A
Other languages
French (fr)
Other versions
FR2124484B1 (en
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 FR2124484A1 publication Critical patent/FR2124484A1/fr
Application granted granted Critical
Publication of FR2124484B1 publication Critical patent/FR2124484B1/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
    • H04Q1/453—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling in which m-out-of-n signalling frequencies are transmitted

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Noise Elimination (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
FR7203789A 1971-02-05 1972-02-04 Expired FR2124484B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7101521A NL7101521A (en) 1971-02-05 1971-02-05

Publications (2)

Publication Number Publication Date
FR2124484A1 true FR2124484A1 (en) 1972-09-22
FR2124484B1 FR2124484B1 (en) 1977-04-01

Family

ID=19812409

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7203789A Expired FR2124484B1 (en) 1971-02-05 1972-02-04

Country Status (5)

Country Link
JP (1) JPS555752B1 (en)
DE (1) DE2201609C3 (en)
FR (1) FR2124484B1 (en)
GB (1) GB1377021A (en)
NL (1) NL7101521A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2340659A1 (en) * 1976-02-09 1977-09-02 Ericsson Telefon Ab L M HOLDING CIRCUIT FOR RECEIVER DETECTING TWO FREQUENCIES OF ONE SIGNAL WITH SEVERAL ACOUSTIC FREQUENCIES
FR2344190A1 (en) * 1976-03-09 1977-10-07 Ericsson Telefon Ab L M RECEIVER OF CODED SIGNALS AT TWO ACOUSTIC FREQUENCIES CHOSEN FROM SEVERAL
FR2373926A1 (en) * 1976-12-10 1978-07-07 Constr Telephoniques MULTI-FREQUENCY SIGNAL RECEIVER

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3104138A1 (en) * 1981-02-06 1982-08-19 TE KA DE Felten & Guilleaume Fernmeldeanlagen GmbH, 8500 Nürnberg SUBSCRIBE CIRCUIT
DE3115151A1 (en) * 1981-04-15 1982-11-11 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Circuit arrangement for evaluating AC signals formed from a plurality of simultaneously transmitted alternating currents with different signal frequencies, in telecommunications systems
JP6426812B1 (en) 2017-08-01 2018-11-21 株式会社多磨バイオ Medical seat
CN113970521B (en) * 2021-10-15 2023-09-26 中国南方电网有限责任公司超高压输电公司检修试验中心 Method and device for monitoring tapping switch oil sample

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
NEANT *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2340659A1 (en) * 1976-02-09 1977-09-02 Ericsson Telefon Ab L M HOLDING CIRCUIT FOR RECEIVER DETECTING TWO FREQUENCIES OF ONE SIGNAL WITH SEVERAL ACOUSTIC FREQUENCIES
FR2344190A1 (en) * 1976-03-09 1977-10-07 Ericsson Telefon Ab L M RECEIVER OF CODED SIGNALS AT TWO ACOUSTIC FREQUENCIES CHOSEN FROM SEVERAL
FR2373926A1 (en) * 1976-12-10 1978-07-07 Constr Telephoniques MULTI-FREQUENCY SIGNAL RECEIVER

Also Published As

Publication number Publication date
GB1377021A (en) 1974-12-11
DE2201609C3 (en) 1979-03-22
DE2201609B2 (en) 1978-06-29
FR2124484B1 (en) 1977-04-01
NL7101521A (en) 1972-08-08
JPS555752B1 (en) 1980-02-08
DE2201609A1 (en) 1972-08-10

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Legal Events

Date Code Title Description
ST Notification of lapse