FR2481542A1 - Recepteur de signalisation numerique a bouton-poussoir - Google Patents

Recepteur de signalisation numerique a bouton-poussoir Download PDF

Info

Publication number
FR2481542A1
FR2481542A1 FR8107177A FR8107177A FR2481542A1 FR 2481542 A1 FR2481542 A1 FR 2481542A1 FR 8107177 A FR8107177 A FR 8107177A FR 8107177 A FR8107177 A FR 8107177A FR 2481542 A1 FR2481542 A1 FR 2481542A1
Authority
FR
France
Prior art keywords
frequency
signal
frequencies
push button
signals
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.)
Granted
Application number
FR8107177A
Other languages
English (en)
French (fr)
Other versions
FR2481542B1 (enExample
Inventor
Takao Nishitani
Nishitani Et Tadaharu Kato Takao
Tadaharu Kato
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.)
NEC Corp
Original Assignee
Nippon Electric Co Ltd
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 JP5389380A external-priority patent/JPS56149889A/ja
Priority claimed from JP5741680A external-priority patent/JPS56153897A/ja
Application filed by Nippon Electric Co Ltd filed Critical Nippon Electric Co Ltd
Publication of FR2481542A1 publication Critical patent/FR2481542A1/fr
Application granted granted Critical
Publication of FR2481542B1 publication Critical patent/FR2481542B1/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details
    • H04Q1/30—Signalling arrangements; Manipulation of signalling currents
    • H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
    • H04Q1/444—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
    • H04Q1/45—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling
    • H04Q1/457—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling with conversion of multifrequency signals into digital signals
    • H04Q1/4575—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling with conversion of multifrequency signals into digital signals which are transmitted in digital form

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Circuits Of Receivers In General (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
FR8107177A 1980-04-23 1981-04-09 Recepteur de signalisation numerique a bouton-poussoir Granted FR2481542A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP5389380A JPS56149889A (en) 1980-04-23 1980-04-23 Push-botton telephone signal receiving system
JP5741680A JPS56153897A (en) 1980-04-30 1980-04-30 Receiving device for push-button telephone signal

Publications (2)

Publication Number Publication Date
FR2481542A1 true FR2481542A1 (fr) 1981-10-30
FR2481542B1 FR2481542B1 (enExample) 1984-05-18

Family

ID=26394617

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8107177A Granted FR2481542A1 (fr) 1980-04-23 1981-04-09 Recepteur de signalisation numerique a bouton-poussoir

Country Status (3)

Country Link
US (1) US4395595A (enExample)
CA (1) CA1155985A (enExample)
FR (1) FR2481542A1 (enExample)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4626629A (en) * 1984-12-14 1986-12-02 Gte Communication Systems Corporation Digital multifrequency signal receiver
SE9202065L (sv) * 1992-07-03 1994-01-04 Ericsson Telefon Ab L M Sätt att förbättra mottagarens känslighet och talimmuniteten vid DTMF-mottagning
JP2851974B2 (ja) * 1992-08-07 1999-01-27 シャープ株式会社 Ｄｔｍｆ信号判定回路
JP2908168B2 (ja) * 1993-03-15 1999-06-21 シャープ株式会社 信号識別回路
WO1996025825A1 (en) * 1995-02-13 1996-08-22 Cidco, Incorporated Method and structure for detecting a customer premises equipment alerting signal
US5619564A (en) * 1995-05-31 1997-04-08 Lucent Technologies Inc. Tone detector with improved performance in the presence of speech
KR0149759B1 (ko) * 1995-11-20 1998-11-02 김광호 디지탈신호 처리칩을 이용한 디티엠프 검출기 및 구현방법
JPH11502999A (ja) * 1996-01-26 1999-03-09 フィリップス エレクトロニクス ネムローゼ フェンノートシャップ トーン検出を改善した伝送システム
RU2128400C1 (ru) * 1997-02-28 1999-03-27 Войсковая часть 35533 Устройство для приема многочастотных сигналов
RU2128401C1 (ru) * 1997-02-28 1999-03-27 Войсковая часть 35533 Устройство для приема многочастотных сигналов
US5995557A (en) * 1997-06-12 1999-11-30 Nortel Networks Corporation Tone detection with aliasing bandpass filters
RU2178950C2 (ru) * 2000-01-20 2002-01-27 в/ч 35533 Устройство для приема сигналов тонального набора
RU2169436C1 (ru) * 2000-01-20 2001-06-20 Войсковая часть 35533 Устройство для приема многочастотных сигналов
RU2174739C1 (ru) * 2000-01-20 2001-10-10 Войсковая часть 35533 Устройство для декодирования двухчастотных сигналов
RU2171549C1 (ru) * 2000-01-26 2001-07-27 Войсковая часть 35533 Устройство для выделения акустических сигналов в каналах связи
RU2214051C2 (ru) * 2001-01-22 2003-10-10 Войсковая часть 35533 Устройство для выделения тональных сигналов в каналах связи

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5577291A (en) * 1978-12-06 1980-06-10 Hitachi Ltd Multi-frequency signal receiver

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE397763B (sv) * 1976-03-09 1977-11-14 Ericsson Telefon Ab L M Mottagaranordning for storningskenslig detektering av atminstone tva tonfrekvenser i en inkommande tonsignal

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5577291A (en) * 1978-12-06 1980-06-10 Hitachi Ltd Multi-frequency signal receiver

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
1972 INTERNATIONAL Z]RICH SEMINAR ON INTEGRATED SYSTEMS FOR SPEECH, VIDEO AND DATA COMMUNICATIONS, 15-17 mars 1972, Z]RICH (CH) *
ELECTRONIC ENGINEERING, vol. 49, no. 590, avril 1977, LONDRES (GB) *
PATENTS ABSTRACTS OF JAPAN, vol. 4, no. 121, 27 août 1980, page 603 E 23 & JP - A - 55 77 291 (HITACHI SEISAKUSHO K.K.) (10-06-1980) *

Also Published As

Publication number Publication date
US4395595A (en) 1983-07-26
FR2481542B1 (enExample) 1984-05-18
CA1155985A (en) 1983-10-25

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