IT1173377B - Metodo e circuiteria per codificare segnali di chiamata telefonica - Google Patents

Metodo e circuiteria per codificare segnali di chiamata telefonica

Info

Publication number
IT1173377B
IT1173377B IT19795/84A IT1979584A IT1173377B IT 1173377 B IT1173377 B IT 1173377B IT 19795/84 A IT19795/84 A IT 19795/84A IT 1979584 A IT1979584 A IT 1979584A IT 1173377 B IT1173377 B IT 1173377B
Authority
IT
Italy
Prior art keywords
circuitry
telephone call
call signals
code telephone
code
Prior art date
Application number
IT19795/84A
Other languages
English (en)
Other versions
IT8419795A0 (it
Inventor
William Alan Burger
David Marlin Embree
Martin Howard Singer
David Ralph Vogelpohl
Original Assignee
American Telephone & Telegraph
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 American Telephone & Telegraph filed Critical American Telephone & Telegraph
Publication of IT8419795A0 publication Critical patent/IT8419795A0/it
Application granted granted Critical
Publication of IT1173377B publication Critical patent/IT1173377B/it

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/02—Calling substations, e.g. by ringing
    • 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
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/66—Substation equipment, e.g. for use by subscribers with means for preventing unauthorised or fraudulent calling
    • H04M1/663—Preventing unauthorised calls to a telephone set
    • H04M1/665—Preventing unauthorised calls to a telephone set by checking the validity of a code
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S379/00—Telephonic communications
    • Y10S379/911—Distinctive ringing

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Telephonic Communication Services (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
IT19795/84A 1983-02-28 1984-02-24 Metodo e circuiteria per codificare segnali di chiamata telefonica IT1173377B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/470,149 US4508937A (en) 1983-02-28 1983-02-28 Method and circuitry for encoding telephone ringing signals

Publications (2)

Publication Number Publication Date
IT8419795A0 IT8419795A0 (it) 1984-02-24
IT1173377B true IT1173377B (it) 1987-06-24

Family

ID=23866469

Family Applications (1)

Application Number Title Priority Date Filing Date
IT19795/84A IT1173377B (it) 1983-02-28 1984-02-24 Metodo e circuiteria per codificare segnali di chiamata telefonica

Country Status (7)

Country Link
US (1) US4508937A (it)
EP (1) EP0137012A4 (it)
JP (1) JPS60500840A (it)
KR (1) KR850005195A (it)
CA (1) CA1213992A (it)
IT (1) IT1173377B (it)
WO (1) WO1984003408A1 (it)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3504243A1 (de) * 1985-02-08 1986-08-14 Philips Patentverwaltung Gmbh, 2000 Hamburg Verfahren und schaltungsanordnung zur erzeugung eines akustischen rufsignals in teilnehmerendstellen von fernmeldeanlagen
US4646347A (en) * 1985-05-02 1987-02-24 American Telephone And Telegraph Company Ringing signal reformatting circuit
US4969186A (en) * 1988-05-12 1990-11-06 Gte North Incorporated Telephone message waiting system and apparatus
JPH03501674A (ja) * 1988-07-25 1991-04-11 アンダーソン　ジョン　ジェームス 個人信号発信電話機
US5127045A (en) * 1989-11-16 1992-06-30 Cragun David R Identifying telephone controller system
JP2814297B2 (ja) * 1990-08-07 1998-10-22 松下電器産業株式会社 無線電話装置
CA2044437C (en) * 1991-06-12 1995-04-04 Dan R.F. Oprea Digitally controlled ringer signal generation
US5675629A (en) * 1995-09-08 1997-10-07 At&T Cordless cellular system base station
US5911120A (en) * 1995-09-08 1999-06-08 At&T Wireless Services Wireless communication system having mobile stations establish a communication link through the base station without using a landline or regional cellular network and without a call in progress
US5732360A (en) * 1995-09-08 1998-03-24 At & T Wireless Services And Atmel Corp Mobile telecommunication device and method used for changing wireless communication between base stations of different kinds
KR970024789A (ko) * 1995-10-16 1997-05-30 김광호 전화기에서 벨소리 다양화 방법
US6058171A (en) * 1996-08-14 2000-05-02 Oakley Telecom, Lc Unique ring caller ID
US6510207B1 (en) * 1999-06-29 2003-01-21 Agere Systems Inc. Voice messaging system storage of emergency alert system warnings
US7792279B2 (en) * 2002-01-18 2010-09-07 At&T Intellectual Property I, L.P. Distinguishing audio alerts
US7013006B1 (en) 2002-01-18 2006-03-14 Bellsouth Intellectual Property Corporation Programmable audio alert system and method
US11271566B2 (en) * 2018-12-14 2022-03-08 Integrated Device Technology, Inc. Digital logic compatible inputs in compound semiconductor circuits

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3740490A (en) * 1971-01-18 1973-06-19 Bell Telephone Labor Inc Tone ringer
US3867585A (en) * 1973-08-02 1975-02-18 Gte Automatic Electric Lab Inc Electronic tone ringer
JPS5173803A (ja) * 1974-12-24 1976-06-26 Toei Denki Kogyo Kk Denwayobidashisochi
US4081617A (en) * 1976-10-29 1978-03-28 Technex International Ltd. Electronic ringing circuit for telephone systems
US4193257A (en) * 1978-11-09 1980-03-18 Watkins Paul F Programmable metronome
DE3049811T1 (de) * 1979-08-20 1982-02-25 Western Electric Co Electronic tone ringer
US4276448A (en) * 1979-08-20 1981-06-30 Bell Telephone Laboratories, Incorporated Electronic tone ringer
US4309574A (en) * 1980-04-15 1982-01-05 Gte Automatic Electric Labs Inc. Electronic tone ringer
US4367376A (en) * 1980-09-17 1983-01-04 Proctor & Associates Co. Electronic telephone ringer including anti-bell tap provisions

Also Published As

Publication number Publication date
KR850005195A (ko) 1985-08-21
US4508937A (en) 1985-04-02
JPS60500840A (ja) 1985-05-30
WO1984003408A1 (en) 1984-08-30
EP0137012A4 (en) 1987-12-08
CA1213992A (en) 1986-11-12
IT8419795A0 (it) 1984-02-24
EP0137012A1 (en) 1985-04-17

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