FR2603443A1 - METHOD FOR RECOGNIZING TELEPHONE TONES, DEVICE IMPLEMENTING THE METHOD, TELEPHONE DEVICE AND ANSWERING MACHINE PROVIDED WITH SUCH A DEVICE - Google Patents
METHOD FOR RECOGNIZING TELEPHONE TONES, DEVICE IMPLEMENTING THE METHOD, TELEPHONE DEVICE AND ANSWERING MACHINE PROVIDED WITH SUCH A DEVICEInfo
- Publication number
- FR2603443A1 FR2603443A1 FR8612267A FR8612267A FR2603443A1 FR 2603443 A1 FR2603443 A1 FR 2603443A1 FR 8612267 A FR8612267 A FR 8612267A FR 8612267 A FR8612267 A FR 8612267A FR 2603443 A1 FR2603443 A1 FR 2603443A1
- Authority
- FR
- France
- Prior art keywords
- telephone
- duration
- tone
- recognizing
- machine provided
- 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
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/82—Line monitoring circuits for call progress or status discrimination
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Telephonic Communication Services (AREA)
- Devices For Supply Of Signal Current (AREA)
Abstract
Method and device for recognizing at least one tone emitted on a telephone network, each tone period comprising a sound phase wherein a 440 Hz signal is emitted, and a silence phase. In general according to this method, the presence of a periodical signal having the appearance of a tone, the duration of the period of said periodical signal is measured, the total measured duration is compared with at least one stored reference duration. When the result of the comparison is positive, the periodical signal is recognized as being the tone whose period duration corresponds to said reference duration. Application to telephone deviator and responders.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8612267A FR2603443A1 (en) | 1986-08-28 | 1986-08-28 | METHOD FOR RECOGNIZING TELEPHONE TONES, DEVICE IMPLEMENTING THE METHOD, TELEPHONE DEVICE AND ANSWERING MACHINE PROVIDED WITH SUCH A DEVICE |
PCT/FR1987/000338 WO1988001819A1 (en) | 1986-08-28 | 1987-08-28 | Method for recognizing telephone tones, device for implementing such method, telephone deviators and responders provided with such a device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8612267A FR2603443A1 (en) | 1986-08-28 | 1986-08-28 | METHOD FOR RECOGNIZING TELEPHONE TONES, DEVICE IMPLEMENTING THE METHOD, TELEPHONE DEVICE AND ANSWERING MACHINE PROVIDED WITH SUCH A DEVICE |
Publications (1)
Publication Number | Publication Date |
---|---|
FR2603443A1 true FR2603443A1 (en) | 1988-03-04 |
Family
ID=9338598
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR8612267A Pending FR2603443A1 (en) | 1986-08-28 | 1986-08-28 | METHOD FOR RECOGNIZING TELEPHONE TONES, DEVICE IMPLEMENTING THE METHOD, TELEPHONE DEVICE AND ANSWERING MACHINE PROVIDED WITH SUCH A DEVICE |
Country Status (2)
Country | Link |
---|---|
FR (1) | FR2603443A1 (en) |
WO (1) | WO1988001819A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2894743A1 (en) * | 2005-12-08 | 2007-06-15 | Univ La Reunion | Digital information transmission method for e.g. satellite, involves transmitting word starting and ending indicators and preventing signal transmission between indicators during duration equal to value multiplied by time units |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4124977C1 (en) * | 1991-07-27 | 1992-09-10 | Grundig E.M.V. Elektro-Mechanische Versuchsanstalt Max Grundig Hollaend. Stiftung & Co Kg, 8510 Fuerth, De |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2030821A (en) * | 1978-09-29 | 1980-04-10 | Plantronics | Tone detector for a telephone answering system |
JPS5966254A (en) * | 1982-10-07 | 1984-04-14 | Sony Corp | Automatic answering telephone set |
DE3346792A1 (en) * | 1982-12-28 | 1984-07-12 | Tamura Electric Works Ltd., Tokio/Tokyo | ANSWERING MACHINE |
-
1986
- 1986-08-28 FR FR8612267A patent/FR2603443A1/en active Pending
-
1987
- 1987-08-28 WO PCT/FR1987/000338 patent/WO1988001819A1/en unknown
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2030821A (en) * | 1978-09-29 | 1980-04-10 | Plantronics | Tone detector for a telephone answering system |
JPS5966254A (en) * | 1982-10-07 | 1984-04-14 | Sony Corp | Automatic answering telephone set |
DE3346792A1 (en) * | 1982-12-28 | 1984-07-12 | Tamura Electric Works Ltd., Tokio/Tokyo | ANSWERING MACHINE |
Non-Patent Citations (2)
Title |
---|
PATENT ABSTRACTS OF JAPAN, vol. 8, no. 173 (E-259)[1610], 9 août 1984; & JP-A-59 66 254 (SONY K.K.) 14-04-1984 * |
POST OFFICE ELECTRICAL ENGINEERS JOURNAL, vol. 71, no. 2, juillet 1978, pages 117-121, Londres, GB; R.S.BROWN: "A new method of tone indentification" * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2894743A1 (en) * | 2005-12-08 | 2007-06-15 | Univ La Reunion | Digital information transmission method for e.g. satellite, involves transmitting word starting and ending indicators and preventing signal transmission between indicators during duration equal to value multiplied by time units |
WO2008068394A1 (en) * | 2005-12-08 | 2008-06-12 | Universite De La Reunion | Method and system for transmitting information |
Also Published As
Publication number | Publication date |
---|---|
WO1988001819A1 (en) | 1988-03-10 |
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