BR7704757A - Arranjo de sinalizacao de resposta para um sistema seletor de tom de audio;e aparelho seletor para uso em uma estacao remota - Google Patents

Arranjo de sinalizacao de resposta para um sistema seletor de tom de audio;e aparelho seletor para uso em uma estacao remota

Info

Publication number
BR7704757A
BR7704757A BR7704757A BR7704757A BR7704757A BR 7704757 A BR7704757 A BR 7704757A BR 7704757 A BR7704757 A BR 7704757A BR 7704757 A BR7704757 A BR 7704757A BR 7704757 A BR7704757 A BR 7704757A
Authority
BR
Brazil
Prior art keywords
selector
appliance
remote station
audio tone
response signaling
Prior art date
Application number
BR7704757A
Other languages
English (en)
Inventor
L Malley
Original Assignee
Westinghouse Air Brake Co
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 Westinghouse Air Brake Co filed Critical Westinghouse Air Brake Co
Publication of BR7704757A publication Critical patent/BR7704757A/pt

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C25/00—Arrangements for preventing or correcting errors; Monitoring arrangements
    • G08C25/02—Arrangements for preventing or correcting errors; Monitoring arrangements by signalling back receiving station to transmitting station
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q9/00—Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom
    • H04Q9/08—Calling by using continuous ac
    • H04Q9/12—Calling by using continuous ac using combinations of frequencies

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Telephonic Communication Services (AREA)
  • Selective Calling Equipment (AREA)
BR7704757A 1976-07-26 1977-07-20 Arranjo de sinalizacao de resposta para um sistema seletor de tom de audio;e aparelho seletor para uso em uma estacao remota BR7704757A (pt)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/708,642 US4064367A (en) 1976-07-26 1976-07-26 Dual tone selector with answerback signalling

Publications (1)

Publication Number Publication Date
BR7704757A true BR7704757A (pt) 1978-04-25

Family

ID=24846611

Family Applications (1)

Application Number Title Priority Date Filing Date
BR7704757A BR7704757A (pt) 1976-07-26 1977-07-20 Arranjo de sinalizacao de resposta para um sistema seletor de tom de audio;e aparelho seletor para uso em uma estacao remota

Country Status (3)

Country Link
US (1) US4064367A (pt)
BR (1) BR7704757A (pt)
CA (1) CA1074934A (pt)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4314102A (en) * 1980-02-13 1982-02-02 Pitney Bowes Inc. Post office box monitoring system
US4469919A (en) * 1981-02-20 1984-09-04 Tandy Corporation Telephone answering device
US4442319A (en) * 1981-02-26 1984-04-10 Treidl Bernhard L Telephone accessible appliance control system
US4517410A (en) * 1982-04-02 1985-05-14 Data Acquisition Services Automatic user selected variable telephone message record and playback system
JPH0644788B2 (ja) * 1984-10-26 1994-06-08 橋本コ−ポレイション株式会社 留守番電話による附加装置のコントロ−ル装置
US4887078A (en) * 1988-05-05 1989-12-12 Jim Cho DTMF-Code controlled lock device
US5208852A (en) * 1988-09-27 1993-05-04 Seiko Epson Corporation Sound generation circuit
FR2685600A1 (fr) * 1991-12-20 1993-06-25 Robart Yves Systeme de surveillance d'une pluralite d'armoires electriques, et notamment d'armoires de sous-repartition telephonique.
US5410541A (en) * 1992-05-04 1995-04-25 Ivon International, Inc. System for simultaneous analog and digital communications over an analog channel
US5828991A (en) * 1995-06-30 1998-10-27 The Research Foundation Of The State University Of New York Sentence reconstruction using word ambiguity resolution
IT1297152B1 (it) * 1996-09-04 1999-08-03 Arkes S R L Sistema di ricezione e trasmissione di segnale.

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3654396A (en) * 1969-10-24 1972-04-04 Nicolaas Biezeveld Telephone screening system
US3631395A (en) * 1970-07-27 1971-12-28 Pitney Bowes Inc Data communication and verification system
US3849764A (en) * 1973-05-29 1974-11-19 Quindar Electronics Programmable frequency decoder
US3859462A (en) * 1973-08-15 1975-01-07 Itt Arrangement to control a function at a remote location

Also Published As

Publication number Publication date
CA1074934A (en) 1980-04-01
US4064367A (en) 1977-12-20

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