FR1487773A - Générateur de tonalité d'appel pour postes téléphoniques - Google Patents

Générateur de tonalité d'appel pour postes téléphoniques

Info

Publication number
FR1487773A
FR1487773A FR70871A FR70871A FR1487773A FR 1487773 A FR1487773 A FR 1487773A FR 70871 A FR70871 A FR 70871A FR 70871 A FR70871 A FR 70871A FR 1487773 A FR1487773 A FR 1487773A
Authority
FR
France
Prior art keywords
tone generator
telephone sets
call tone
call
telephone
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
FR70871A
Other languages
English (en)
Inventor
John Frederick Why
Athanasios Papadopoulos
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 FR1487773A publication Critical patent/FR1487773A/fr
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
    • H04M19/04—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone the ringing-current being generated at the substations
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00—Adapting or protecting infrastructure or their operation

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Telephone Set Structure (AREA)
  • Devices For Supply Of Signal Current (AREA)
FR70871A 1965-07-26 1966-07-26 Générateur de tonalité d'appel pour postes téléphoniques Expired FR1487773A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB31808/65A GB1128053A (en) 1965-07-26 1965-07-26 Acoustic signalling means particularly for telephone sets

Publications (1)

Publication Number Publication Date
FR1487773A true FR1487773A (fr) 1967-07-07

Family

ID=10328731

Family Applications (1)

Application Number Title Priority Date Filing Date
FR70871A Expired FR1487773A (fr) 1965-07-26 1966-07-26 Générateur de tonalité d'appel pour postes téléphoniques

Country Status (6)

Country Link
US (1) US3467788A (fr)
BE (1) BE684594A (fr)
DE (1) DE1487332A1 (fr)
FR (1) FR1487773A (fr)
GB (1) GB1128053A (fr)
NL (1) NL6610417A (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7017136A (fr) * 1970-11-24 1972-05-26
US4251694A (en) * 1979-08-16 1981-02-17 Western Electric Company, Inc. Tone-ringing circuits and methods for telephone sets
US5218634A (en) * 1990-05-29 1993-06-08 American Phone Products, Inc. Ringer assembly
US6748060B2 (en) 2002-04-08 2004-06-08 Plantronics, Inc. Apparatus and method for providing voice telephone instructions

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1495295A (en) * 1924-05-27 Telephone circuits
US2589800A (en) * 1950-05-19 1952-03-18 Bell Telephone Labor Inc Telephone signaling system
US2663782A (en) * 1950-09-12 1953-12-22 Bell Telephone Labor Inc Circuit regulating device
NL245026A (fr) * 1958-11-05

Also Published As

Publication number Publication date
BE684594A (fr) 1967-01-26
NL6610417A (fr) 1967-01-27
DE1487332A1 (de) 1969-04-24
US3467788A (en) 1969-09-16
GB1128053A (en) 1968-09-25

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