CA1015079A - Circuit arrangement for a tone pushbutton selection telephone subscriber set - Google Patents

Circuit arrangement for a tone pushbutton selection telephone subscriber set

Info

Publication number
CA1015079A
CA1015079A CA220,552A CA220552A CA1015079A CA 1015079 A CA1015079 A CA 1015079A CA 220552 A CA220552 A CA 220552A CA 1015079 A CA1015079 A CA 1015079A
Authority
CA
Canada
Prior art keywords
circuit arrangement
telephone subscriber
subscriber set
selection telephone
tone
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
CA220,552A
Other languages
English (en)
Inventor
Petrie J. Van Der Plaats
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
Application granted granted Critical
Publication of CA1015079A publication Critical patent/CA1015079A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/26—Devices for calling a subscriber
    • H04M1/30—Devices which can set up and transmit only one digit at a time
    • H04M1/50—Devices which can set up and transmit only one digit at a time by generating or selecting currents of predetermined frequencies or combinations of frequencies

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Telephonic Communication Services (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Amplifiers (AREA)
  • Interface Circuits In Exchanges (AREA)
CA220,552A 1974-02-26 1975-02-21 Circuit arrangement for a tone pushbutton selection telephone subscriber set Expired CA1015079A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7402574A NL7402574A (nl) 1974-02-26 1974-02-26 Schakeling voor een toondruktoetskeuzetelefoon- toestel.

Publications (1)

Publication Number Publication Date
CA1015079A true CA1015079A (en) 1977-08-02

Family

ID=19820838

Family Applications (1)

Application Number Title Priority Date Filing Date
CA220,552A Expired CA1015079A (en) 1974-02-26 1975-02-21 Circuit arrangement for a tone pushbutton selection telephone subscriber set

Country Status (10)

Country Link
US (1) US3978295A (xx)
JP (1) JPS547644B2 (xx)
BE (1) BE825893A (xx)
CA (1) CA1015079A (xx)
DE (1) DE2505955C3 (xx)
DK (1) DK141979B (xx)
FR (1) FR2262457B1 (xx)
GB (1) GB1452254A (xx)
NL (1) NL7402574A (xx)
SE (1) SE399169B (xx)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4196318A (en) * 1978-09-29 1980-04-01 Bell Telephone Laboratories, Incorporated Electronically-switched multifrequency generator for providing tone signaling
US4352958A (en) * 1979-12-13 1982-10-05 Bell Telephone Laboratories, Incorporated Electronically-switched multifrequency generator with transducer control
US4472601A (en) * 1982-07-14 1984-09-18 Rca Corporation Control circuit for telephone receiver and transmitter
US6529450B1 (en) * 1998-08-03 2003-03-04 Dictaphone Corporation Hand microphone interfaced to game controller port of personal computer

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL257471A (xx) * 1959-12-16 1900-01-01
DE1201417B (de) * 1964-07-10 1965-09-23 Standard Elektrik Lorenz Ag Tonfrequentes Tastwahlverfahren ohne Gleichstrom-Wahlbegleitzeichen in Fernmelde-, insbesondere Fernsprechanlagen und Schaltungsanordnung zur Durchfuehrung des Verfahrens
US3424870A (en) * 1965-09-14 1969-01-28 Bell Telephone Labor Inc Multifrequency signal generator for tone-dialed telephones
BE693127A (xx) * 1967-01-25 1967-07-25
CA861632A (en) * 1969-03-19 1971-01-19 Northern Electric Company Limited Pushbutton dial telephone set
US3665489A (en) * 1969-06-06 1972-05-23 Ericsson Telefon Ab L M Telephone instrument for voice frequency choice of number

Also Published As

Publication number Publication date
SE7501942L (xx) 1975-08-27
DK67775A (xx) 1975-10-27
JPS50120506A (xx) 1975-09-20
DE2505955C3 (de) 1981-06-04
JPS547644B2 (xx) 1979-04-09
FR2262457A1 (xx) 1975-09-19
US3978295A (en) 1976-08-31
DK141979C (xx) 1980-12-08
DE2505955A1 (de) 1975-08-28
BE825893A (fr) 1975-08-25
NL7402574A (nl) 1975-08-28
SE399169B (sv) 1978-01-30
DE2505955B2 (de) 1980-08-14
DK141979B (da) 1980-07-28
FR2262457B1 (xx) 1978-02-03
GB1452254A (en) 1976-10-13

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