FR2399175A1 - Dispositif de detection de la reception de signaux multifrequence - Google Patents
Dispositif de detection de la reception de signaux multifrequenceInfo
- Publication number
- FR2399175A1 FR2399175A1 FR7822120A FR7822120A FR2399175A1 FR 2399175 A1 FR2399175 A1 FR 2399175A1 FR 7822120 A FR7822120 A FR 7822120A FR 7822120 A FR7822120 A FR 7822120A FR 2399175 A1 FR2399175 A1 FR 2399175A1
- Authority
- FR
- France
- Prior art keywords
- detection device
- frequency signal
- signal reception
- reception detection
- frequency
- 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.)
- Pending
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
- H04Q1/453—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling in which m-out-of-n signalling frequencies are transmitted
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Circuits Of Receivers In General (AREA)
Abstract
a. Dispositif pour détecter la réception de signaux multifréquence, comprenant plusieurs filtres pour laisser passer des tonalités multifréquence individuelles d'un signal reçu avec un gain réglé. b. Des détecteurs de seuil réglables sont connectés à plusieurs filtres pour engendrer des signaux de sortie représentant les tonalités multifréquence reçues qui ont des amplitudes supérieures à des niveaux de seuils prescrits, et un circuit de contrôle est connecté pour engendrer des signaux pour régler les détecteurs de seuils. c. Application aux télécommunications.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US05/819,112 US4091243A (en) | 1977-07-26 | 1977-07-26 | Multifrequency signal receiver |
Publications (1)
Publication Number | Publication Date |
---|---|
FR2399175A1 true FR2399175A1 (fr) | 1979-02-23 |
Family
ID=25227234
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7822120A Pending FR2399175A1 (fr) | 1977-07-26 | 1978-07-26 | Dispositif de detection de la reception de signaux multifrequence |
Country Status (13)
Country | Link |
---|---|
US (1) | US4091243A (fr) |
JP (1) | JPS5424509A (fr) |
AU (1) | AU3819478A (fr) |
BE (1) | BE869241A (fr) |
CA (1) | CA1102887A (fr) |
ES (1) | ES472043A1 (fr) |
FR (1) | FR2399175A1 (fr) |
GB (1) | GB2021354A (fr) |
IL (1) | IL55197A (fr) |
IT (1) | IT1097368B (fr) |
NL (1) | NL7807863A (fr) |
SE (1) | SE7902501L (fr) |
WO (1) | WO1979000066A1 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2443783A1 (fr) * | 1978-12-07 | 1980-07-04 | Western Electric Co | Detecteur de signaux multifrequences |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4386239A (en) * | 1980-06-17 | 1983-05-31 | Bell Telephone Laboratories, Incorporated | Multifrequency tone detector |
ZA82379B (en) * | 1981-01-28 | 1982-12-29 | Grace Gmbh | Process for producing porous materials and the use thereof |
US4398147A (en) * | 1981-04-15 | 1983-08-09 | Western Electric Company, Inc. | Methods of testing multifrequency dialing signals |
US4463851A (en) * | 1982-04-26 | 1984-08-07 | Meritex Plastic Inc. | Protective enclosure for electronic devices |
US4608457A (en) * | 1984-04-11 | 1986-08-26 | Fowler Stephen L | Telecommunications device for the hearing impared |
US4604755A (en) * | 1984-06-01 | 1986-08-05 | International Business Machines Corp. | Feed forward dual channel automatic level control for dual tone multi-frequency receivers |
US4709297A (en) * | 1984-06-29 | 1987-11-24 | Siemens Aktiengesellschaft | Guiding device for semiconductor components with DIL casings |
CA1239719A (fr) * | 1985-11-22 | 1988-07-26 | Mitel Corporation | Detecteur de tonalites de manoeuvre |
US5588052A (en) * | 1991-11-19 | 1996-12-24 | Sharp Kabushiki Kaisha | DTMF signal judging apparatus |
EP0548438A1 (fr) * | 1991-12-20 | 1993-06-30 | International Business Machines Corporation | Procédé et dispositif pour la détection de signaux multifréquences à deux tons |
US5321745A (en) * | 1992-05-26 | 1994-06-14 | Vmx, Inc. | Adaptive efficient single/dual tone decoder apparatus and method for identifying call-progression signals |
US5699421A (en) * | 1995-05-31 | 1997-12-16 | Casio Phonemate, Inc. | Telephone answering device with low cost dual tone multi-frequency detector |
US5802112A (en) * | 1996-01-16 | 1998-09-01 | Transcendat Inc. | Multi-level, multi-frequency interference pattern analog waveform encoding of digital data for transmission |
US6038262A (en) * | 1998-06-09 | 2000-03-14 | Transcendata, Inc. | Method and apparatus for compensation of electro-magnetic distortion using weighted feedback delay for amplitude coded sinusoidal waveform generation and transmission |
GB2357216B (en) * | 1999-12-11 | 2004-05-12 | Mitel Corp | Method and apparatus for detecting dual tone alerting signal in telephone systems |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU466639A (en) * | 1939-10-13 | 1940-08-22 | Philips Lamps Limited | Improvements in or relating to adjustable slidable condensers |
NL6716500A (fr) * | 1966-12-03 | 1968-06-04 | ||
US3836727A (en) * | 1972-01-27 | 1974-09-17 | Philips Corp | Signal receiver for receiving signals of different frequency |
US3875347A (en) * | 1973-10-01 | 1975-04-01 | Gte Automatic Electric Lab Inc | Multifrequency signal receiver |
US3914557A (en) * | 1973-04-11 | 1975-10-21 | Bell Telephone Labor Inc | Multifrequency tone detecting arrangement |
US3936801A (en) * | 1974-09-12 | 1976-02-03 | Bell Telephone Laboratories, Incorporated | Multifrequency signal receiver timing circuit |
US3961143A (en) * | 1973-09-12 | 1976-06-01 | International Standard Electric Corporation | Multi-frequency signalling system |
US4016370A (en) * | 1975-03-19 | 1977-04-05 | Chestel, Inc. | Digital tone decoder |
-
1977
- 1977-07-26 US US05/819,112 patent/US4091243A/en not_active Expired - Lifetime
-
1978
- 1978-06-29 CA CA306,495A patent/CA1102887A/fr not_active Expired
- 1978-07-20 GB GB7906993A patent/GB2021354A/en not_active Withdrawn
- 1978-07-20 AU AU38194/78A patent/AU3819478A/en active Pending
- 1978-07-20 WO PCT/US1978/000044 patent/WO1979000066A1/fr unknown
- 1978-07-21 IL IL55197A patent/IL55197A/xx unknown
- 1978-07-24 NL NL7807863A patent/NL7807863A/xx not_active Application Discontinuation
- 1978-07-25 BE BE189477A patent/BE869241A/fr unknown
- 1978-07-25 JP JP9006978A patent/JPS5424509A/ja active Pending
- 1978-07-25 IT IT26073/78A patent/IT1097368B/it active
- 1978-07-26 ES ES472043A patent/ES472043A1/es not_active Expired
- 1978-07-26 FR FR7822120A patent/FR2399175A1/fr active Pending
-
1979
- 1979-03-20 SE SE7902501A patent/SE7902501L/sv unknown
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU466639A (en) * | 1939-10-13 | 1940-08-22 | Philips Lamps Limited | Improvements in or relating to adjustable slidable condensers |
NL6716500A (fr) * | 1966-12-03 | 1968-06-04 | ||
US3836727A (en) * | 1972-01-27 | 1974-09-17 | Philips Corp | Signal receiver for receiving signals of different frequency |
US3914557A (en) * | 1973-04-11 | 1975-10-21 | Bell Telephone Labor Inc | Multifrequency tone detecting arrangement |
US3961143A (en) * | 1973-09-12 | 1976-06-01 | International Standard Electric Corporation | Multi-frequency signalling system |
US3875347A (en) * | 1973-10-01 | 1975-04-01 | Gte Automatic Electric Lab Inc | Multifrequency signal receiver |
US3936801A (en) * | 1974-09-12 | 1976-02-03 | Bell Telephone Laboratories, Incorporated | Multifrequency signal receiver timing circuit |
US4016370A (en) * | 1975-03-19 | 1977-04-05 | Chestel, Inc. | Digital tone decoder |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2443783A1 (fr) * | 1978-12-07 | 1980-07-04 | Western Electric Co | Detecteur de signaux multifrequences |
Also Published As
Publication number | Publication date |
---|---|
GB2021354A (en) | 1979-11-28 |
JPS5424509A (en) | 1979-02-23 |
AU3819478A (en) | 1980-01-24 |
IT7826073A0 (it) | 1978-07-25 |
IT1097368B (it) | 1985-08-31 |
BE869241A (fr) | 1978-11-16 |
IL55197A0 (en) | 1978-09-29 |
NL7807863A (nl) | 1979-01-30 |
IL55197A (en) | 1980-05-30 |
ES472043A1 (es) | 1979-02-01 |
WO1979000066A1 (fr) | 1979-02-22 |
US4091243A (en) | 1978-05-23 |
SE7902501L (fr) | 1979-03-20 |
CA1102887A (fr) | 1981-06-09 |
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