GB2071963B - Electronic toner ringer - Google Patents

Electronic toner ringer

Info

Publication number
GB2071963B
GB2071963B GB8112103A GB8112103A GB2071963B GB 2071963 B GB2071963 B GB 2071963B GB 8112103 A GB8112103 A GB 8112103A GB 8112103 A GB8112103 A GB 8112103A GB 2071963 B GB2071963 B GB 2071963B
Authority
GB
United Kingdom
Prior art keywords
ringer
electronic toner
toner
electronic
toner ringer
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
GB8112103A
Other versions
GB2071963A (en
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.)
AT&T Corp
Original Assignee
Western Electric Co 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
Priority claimed from US06/067,718 external-priority patent/US4276448A/en
Priority claimed from US06/067,717 external-priority patent/US4292604A/en
Application filed by Western Electric Co Inc filed Critical Western Electric Co Inc
Publication of GB2071963A publication Critical patent/GB2071963A/en
Application granted granted Critical
Publication of GB2071963B publication Critical patent/GB2071963B/en
Expired legal-status Critical Current

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)
  • Amplifiers (AREA)
  • Electrotherapy Devices (AREA)
  • Telephone Function (AREA)
GB8112103A 1979-08-20 1980-08-01 Electronic toner ringer Expired GB2071963B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US06/067,718 US4276448A (en) 1979-08-20 1979-08-20 Electronic tone ringer
US06/067,717 US4292604A (en) 1979-08-20 1979-08-20 Relaxation oscillator with plural constant current sources

Publications (2)

Publication Number Publication Date
GB2071963A GB2071963A (en) 1981-09-23
GB2071963B true GB2071963B (en) 1983-07-27

Family

ID=26748187

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8112103A Expired GB2071963B (en) 1979-08-20 1980-08-01 Electronic toner ringer

Country Status (5)

Country Link
JP (1) JPS56501185A (en)
DE (1) DE3049811T1 (en)
GB (1) GB2071963B (en)
SE (2) SE428986B (en)
WO (1) WO1981000657A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4508937A (en) * 1983-02-28 1985-04-02 At&T Information Systems Inc. Method and circuitry for encoding telephone ringing signals
JPS61237559A (en) * 1985-04-15 1986-10-22 Ricoh Co Ltd Call signal detection circuit
FR2693335B1 (en) * 1992-07-02 1994-08-05 Matra Communication RINGER CIRCUIT, PARTICULARLY FOR TELEPHONE SET.

Family Cites Families (10)

* 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
CA952634A (en) * 1971-01-18 1974-08-06 Robert F. Mcalonie Tone ringer
DE2205559C3 (en) * 1972-02-07 1980-08-14 Telefonbau Und Normalzeit Gmbh, 6000 Frankfurt Circuitry for AC call receiving lines to prevent the effects of DC pulses
US3808379A (en) * 1972-05-30 1974-04-30 Gte Automatic Electric Lab Inc Telephone tone ringer
US3860764A (en) * 1973-01-12 1975-01-14 Itt Electronic tone generator
FR2235556B1 (en) * 1973-06-28 1978-09-08 Person Jean Michel
US3867585A (en) * 1973-08-02 1975-02-18 Gte Automatic Electric Lab Inc Electronic tone ringer
US3965307A (en) * 1974-05-28 1976-06-22 Gte Automatic Electric Laboratories Incorporated Electronic tone ringer
US4046970A (en) * 1976-04-12 1977-09-06 Magnetic Controls Company Ringing detector for telephone circuits
US4081617A (en) * 1976-10-29 1978-03-28 Technex International Ltd. Electronic ringing circuit for telephone systems

Also Published As

Publication number Publication date
JPS56501185A (en) 1981-08-20
WO1981000657A1 (en) 1981-03-05
SE8204441D0 (en) 1982-07-23
SE8102406L (en) 1981-04-14
SE429707B (en) 1983-09-19
GB2071963A (en) 1981-09-23
SE8204441L (en) 1982-07-23
DE3049811C2 (en) 1987-04-16
DE3049811T1 (en) 1982-02-25
SE428986B (en) 1983-08-01

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee