BR6463840D0 - Sinalizador de tom de telefone - Google Patents

Sinalizador de tom de telefone

Info

Publication number
BR6463840D0
BR6463840D0 BR163840/64A BR16384064A BR6463840D0 BR 6463840 D0 BR6463840 D0 BR 6463840D0 BR 163840/64 A BR163840/64 A BR 163840/64A BR 16384064 A BR16384064 A BR 16384064A BR 6463840 D0 BR6463840 D0 BR 6463840D0
Authority
BR
Brazil
Prior art keywords
signaler
telephone tone
tone
telephone
tone signaler
Prior art date
Application number
BR163840/64A
Other languages
English (en)
Inventor
Sa Se
Original Assignee
Sa Se
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 Sa Se filed Critical Sa Se
Publication of BR6463840D0 publication Critical patent/BR6463840D0/pt

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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/02—Manually-operated control
    • H03G3/04—Manually-operated control in untuned amplifiers
    • H03G3/10—Manually-operated control in untuned amplifiers having semiconductor devices

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)
BR163840/64A 1963-11-27 1964-10-29 Sinalizador de tom de telefone BR6463840D0 (pt)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB46851/63A GB986310A (en) 1963-11-27 1963-11-27 Telephone tone ringer

Publications (1)

Publication Number Publication Date
BR6463840D0 true BR6463840D0 (pt) 1973-09-18

Family

ID=10442824

Family Applications (1)

Application Number Title Priority Date Filing Date
BR163840/64A BR6463840D0 (pt) 1963-11-27 1964-10-29 Sinalizador de tom de telefone

Country Status (5)

Country Link
US (1) US3387097A (pt)
BR (1) BR6463840D0 (pt)
DE (1) DE1207973B (pt)
GB (1) GB986310A (pt)
NL (1) NL6413573A (pt)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1086702A (en) * 1964-10-15 1967-10-11 Post Office Electrical calling circuits
US4010329A (en) * 1975-10-29 1977-03-01 Frederick Gaylord Draper Crescendo control of signalling devices
US4076968A (en) * 1976-09-02 1978-02-28 Bell Telephone Laboratories, Incorporated Telephone ringer intensity control responsive to ambient noise
US4374307A (en) * 1980-08-29 1983-02-15 Tandy Corporation Ringer system for a telephone
DE3133531C2 (de) * 1981-08-25 1989-06-08 Telefonbau Und Normalzeit Gmbh, 6000 Frankfurt Schaltungsanordnung zum Einstellen der Lautstärke eines aus einem elektroakustischen Wandler bestehenden Anruforgans in Fernsprechapparaten
US7136482B2 (en) * 2004-10-26 2006-11-14 Motorola, Inc. Progressive alert indications in a communication device

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2589800A (en) * 1950-05-19 1952-03-18 Bell Telephone Labor Inc Telephone signaling system
DE1108749B (de) * 1958-05-06 1961-06-15 Telefonbau Schaltungsanordnung zur Ausloesung eines tonfrequenten Rufes an Teilnehmer-stellen von Fernsprechanlagen
GB956356A (en) * 1960-07-21 1964-04-22 Standard Telephones Cables Ltd Improvements in or relating to signalling methods between subscriber's sets and exchage
US3227813A (en) * 1962-07-31 1966-01-04 Automatic Elect Lab Electronic ringing arrangements in telephone systems

Also Published As

Publication number Publication date
US3387097A (en) 1968-06-04
NL6413573A (pt) 1965-05-28
GB986310A (en) 1965-03-17
DE1207973B (de) 1965-12-30

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