DE69319942D1 - Unterdrückungsvorrichtung für akustische Rückkopplung, insbesondere für Zusatzwecker in Stecktelephonsystemen - Google Patents

Unterdrückungsvorrichtung für akustische Rückkopplung, insbesondere für Zusatzwecker in Stecktelephonsystemen

Info

Publication number
DE69319942D1
DE69319942D1 DE69319942T DE69319942T DE69319942D1 DE 69319942 D1 DE69319942 D1 DE 69319942D1 DE 69319942 T DE69319942 T DE 69319942T DE 69319942 T DE69319942 T DE 69319942T DE 69319942 D1 DE69319942 D1 DE 69319942D1
Authority
DE
Germany
Prior art keywords
plug
suppression device
telephone systems
acoustic feedback
alarm clocks
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 - Fee Related
Application number
DE69319942T
Other languages
English (en)
Other versions
DE69319942T2 (de
Inventor
Pietro Consiglio
Carlo Antonini
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.)
STMicroelectronics SRL
Original Assignee
STMicroelectronics SRL
SGS Thomson Microelectronics SRL
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 STMicroelectronics SRL, SGS Thomson Microelectronics SRL filed Critical STMicroelectronics SRL
Application granted granted Critical
Publication of DE69319942D1 publication Critical patent/DE69319942D1/de
Publication of DE69319942T2 publication Critical patent/DE69319942T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/738—Interface circuits for coupling substations to external telephone lines
    • H04M1/74—Interface circuits for coupling substations to external telephone lines with means for reducing interference; with means for reducing effects due to line faults

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Details Of Connecting Devices For Male And Female Coupling (AREA)
DE69319942T 1992-02-17 1993-02-12 Unterdrückungsvorrichtung für akustische Rückkopplung, insbesondere für Zusatzwecker in Stecktelephonsystemen Expired - Fee Related DE69319942T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITMI920336A IT1254795B (it) 1992-02-17 1992-02-17 Dispositivo di soppressione di retroazione acustica particolarmente per suonerie ausiliarie in impianti telefonici a spina.

Publications (2)

Publication Number Publication Date
DE69319942D1 true DE69319942D1 (de) 1998-09-03
DE69319942T2 DE69319942T2 (de) 1998-12-17

Family

ID=11362003

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69319942T Expired - Fee Related DE69319942T2 (de) 1992-02-17 1993-02-12 Unterdrückungsvorrichtung für akustische Rückkopplung, insbesondere für Zusatzwecker in Stecktelephonsystemen

Country Status (5)

Country Link
US (1) US5459783A (de)
EP (1) EP0556742B1 (de)
JP (1) JPH066439A (de)
DE (1) DE69319942T2 (de)
IT (1) IT1254795B (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0756409B1 (de) * 1995-07-28 2004-04-14 STMicroelectronics S.r.l. Störungsklingelunterdrückungsvorrichtung, insbesondere für Zusatzklingeln in Stecktelephonsystemen
EP3955035A1 (de) 2020-08-10 2022-02-16 Österreichische Akademie der Wissenschaften Photonische integrierte schaltung
KR20230133420A (ko) 2022-03-11 2023-09-19 주식회사 한화 대면적 단일 챔버를 갖는 기판 처리 장치

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2539415A1 (de) * 1975-09-04 1977-03-10 Siemens Ag Schaltungsanordnung fuer eine zweiwege-fernsprechstation mit rueckfragemoeglichkeit
IT1071838B (it) * 1976-11-12 1985-04-10 Cselt Centro Studi Lab Telecom Soppressore di impulsi di suoneria indesiderati per apparecchi telefonici
US4107476A (en) * 1977-10-03 1978-08-15 Northern Telecom Limited Electronic tone ringer control circuit for a telephone set
US4213012A (en) * 1978-11-03 1980-07-15 General Signal Corporation Discriminating means for telephone circuits
US4991051A (en) * 1986-09-12 1991-02-05 Northern Telecom Limited Protection arrangements for communications lines
US4941063A (en) * 1988-03-04 1990-07-10 Oneac Corporation Telephone lines overvoltage protection apparatus

Also Published As

Publication number Publication date
JPH066439A (ja) 1994-01-14
DE69319942T2 (de) 1998-12-17
ITMI920336A0 (it) 1992-02-17
EP0556742B1 (de) 1998-07-29
EP0556742A1 (de) 1993-08-25
US5459783A (en) 1995-10-17
ITMI920336A1 (it) 1993-08-17
IT1254795B (it) 1995-10-11

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee