IT8121175A0 - Suoneria a tono elettronica. - Google Patents

Suoneria a tono elettronica.

Info

Publication number
IT8121175A0
IT8121175A0 IT8121175A IT2117581A IT8121175A0 IT 8121175 A0 IT8121175 A0 IT 8121175A0 IT 8121175 A IT8121175 A IT 8121175A IT 2117581 A IT2117581 A IT 2117581A IT 8121175 A0 IT8121175 A0 IT 8121175A0
Authority
IT
Italy
Prior art keywords
electronic tone
tone ringer
ringer
electronic
tone
Prior art date
Application number
IT8121175A
Other languages
English (en)
Other versions
IT1137135B (it
Inventor
John D Sublette
Stobbs William
Original Assignee
Gte Automatic Electric Lab Inc
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 Gte Automatic Electric Lab Inc filed Critical Gte Automatic Electric Lab Inc
Publication of IT8121175A0 publication Critical patent/IT8121175A0/it
Application granted granted Critical
Publication of IT1137135B publication Critical patent/IT1137135B/it

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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)
IT21175/81A 1980-04-15 1981-04-15 Suoneria a tono elettronica IT1137135B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/140,525 US4309574A (en) 1980-04-15 1980-04-15 Electronic tone ringer

Publications (2)

Publication Number Publication Date
IT8121175A0 true IT8121175A0 (it) 1981-04-15
IT1137135B IT1137135B (it) 1986-09-03

Family

ID=22491644

Family Applications (1)

Application Number Title Priority Date Filing Date
IT21175/81A IT1137135B (it) 1980-04-15 1981-04-15 Suoneria a tono elettronica

Country Status (6)

Country Link
US (1) US4309574A (it)
JP (1) JPS572150A (it)
AU (1) AU543339B2 (it)
BE (1) BE886979A (it)
CA (1) CA1149090A (it)
IT (1) IT1137135B (it)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4477697A (en) * 1982-11-22 1984-10-16 At&T Bell Laboratories Method and circuitry for encoding telephone ringing signals
US4508937A (en) * 1983-02-28 1985-04-02 At&T Information Systems Inc. Method and circuitry for encoding telephone ringing signals
DE3538088C2 (de) * 1985-10-25 1993-11-11 Siemens Ag Schaltungsanordnung für einen Überspannungsschutz in elektronischen Fernsprechstationen
FR2693335B1 (fr) * 1992-07-02 1994-08-05 Matra Communication Circuit de sonnerie notamment pour poste telephonique.
US5795440A (en) * 1993-12-20 1998-08-18 The Procter & Gamble Company Method of making wet pressed tissue paper
US5776307A (en) * 1993-12-20 1998-07-07 The Procter & Gamble Company Method of making wet pressed tissue paper with felts having selected permeabilities
GB2289187B (en) * 1994-04-26 1999-01-20 Motorola Inc Telephone line interface circuit
US5526418A (en) * 1994-10-24 1996-06-11 Acer Peripherals Ringer circuit
US5830316A (en) * 1997-05-16 1998-11-03 The Procter & Gamble Company Method of wet pressing tissue paper with three felt layers
US7994759B2 (en) * 2009-04-13 2011-08-09 Himax Technologies Limited System and method for driving a power supply device in an initial activation stage

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1195360B (de) * 1963-10-15 1965-06-24 Merk Ag Telefonbau Friedrich Schaltungsanordnung zur Verstaerkung tonfrequenter Anrufsignale in Teilnehmer-stationen von Fernsprechanlagen
DE2063624C3 (de) * 1970-12-23 1974-01-24 Krone Gmbh, 1000 Berlin Elektronischer Wecker für Fernsprechapparate
US3965307A (en) * 1974-05-28 1976-06-22 Gte Automatic Electric Laboratories Incorporated Electronic tone ringer
US4214131A (en) * 1978-12-18 1980-07-22 Floyd Bell Associates Inc. Electronic audio signalling device for telephones

Also Published As

Publication number Publication date
CA1149090A (en) 1983-06-28
AU6528880A (en) 1981-10-22
IT1137135B (it) 1986-09-03
BE886979A (fr) 1981-05-04
AU543339B2 (en) 1985-04-18
US4309574A (en) 1982-01-05
JPS572150A (en) 1982-01-07

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