ES422269A1 - Un generador de senales en audio. - Google Patents

Un generador de senales en audio.

Info

Publication number
ES422269A1
ES422269A1 ES422269A ES422269A ES422269A1 ES 422269 A1 ES422269 A1 ES 422269A1 ES 422269 A ES422269 A ES 422269A ES 422269 A ES422269 A ES 422269A ES 422269 A1 ES422269 A1 ES 422269A1
Authority
ES
Spain
Prior art keywords
produce
tone
tone generator
pairs
audible
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
ES422269A
Other languages
English (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.)
Nokia Spain SA
Original Assignee
Alcatel Espana SA
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 Alcatel Espana SA filed Critical Alcatel Espana SA
Publication of ES422269A1 publication Critical patent/ES422269A1/es
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B3/00—Audible signalling systems, e.g. audible personal calling systems
    • G08B3/10—Audible signalling systems, e.g. audible personal calling systems using electric transmission; using electromagnetic transmission
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Alarm Systems (AREA)
  • Mobile Radio Communication Systems (AREA)
ES422269A 1973-01-12 1974-01-12 Un generador de senales en audio. Expired ES422269A1 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US322929A US3860764A (en) 1973-01-12 1973-01-12 Electronic tone generator

Publications (1)

Publication Number Publication Date
ES422269A1 true ES422269A1 (es) 1976-06-16

Family

ID=23257076

Family Applications (1)

Application Number Title Priority Date Filing Date
ES422269A Expired ES422269A1 (es) 1973-01-12 1974-01-12 Un generador de senales en audio.

Country Status (4)

Country Link
US (1) US3860764A (es)
DE (1) DE2400192A1 (es)
ES (1) ES422269A1 (es)
GB (1) GB1424485A (es)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4107476A (en) * 1977-10-03 1978-08-15 Northern Telecom Limited Electronic tone ringer control circuit for a telephone set
DE3049811C2 (de) * 1979-08-20 1987-04-16 At & T Technologies, Inc., New York, N.Y. Schaltungsanordnung elektrischer Rufstromsignale in ein akustisches Signal
US4276448A (en) * 1979-08-20 1981-06-30 Bell Telephone Laboratories, Incorporated Electronic tone ringer
US4491691A (en) * 1983-02-28 1985-01-01 At&T Bell Laboratories Electronic tone ringer

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2759179A (en) * 1952-12-05 1956-08-14 Bell Telephone Labor Inc Ringing circuit
US3508012A (en) * 1967-11-24 1970-04-21 Bell Telephone Labor Inc Compatible tone ringer
JPS5134302B1 (es) * 1969-01-22 1976-09-25
US3740490A (en) * 1971-01-18 1973-06-19 Bell Telephone Labor Inc Tone ringer
US3744022A (en) * 1971-12-30 1973-07-03 Vapor Corp Transit vehicle door signal apparatus

Also Published As

Publication number Publication date
US3860764A (en) 1975-01-14
GB1424485A (en) 1976-02-11
DE2400192A1 (de) 1974-07-25

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