NL186057C - SIGNAL RECEIVER WORKING WITH SEVERAL FREQUENCIES FOR RECEIVING PRE-CERTAIN DOUBLE TONE SIGNALS. - Google Patents
SIGNAL RECEIVER WORKING WITH SEVERAL FREQUENCIES FOR RECEIVING PRE-CERTAIN DOUBLE TONE SIGNALS.Info
- Publication number
- NL186057C NL186057C NLAANVRAGE7702219,A NL7702219A NL186057C NL 186057 C NL186057 C NL 186057C NL 7702219 A NL7702219 A NL 7702219A NL 186057 C NL186057 C NL 186057C
- Authority
- NL
- Netherlands
- Prior art keywords
- signal receiver
- tone signals
- several frequencies
- receiving pre
- double tone
- Prior art date
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
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Stereo-Broadcasting Methods (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA247,035A CA1031086A (en) | 1976-03-03 | 1976-03-03 | Method and apparatus for translating multiple frequency signalling |
Publications (3)
Publication Number | Publication Date |
---|---|
NL7702219A NL7702219A (en) | 1977-09-06 |
NL186057B NL186057B (en) | 1990-04-02 |
NL186057C true NL186057C (en) | 1990-09-03 |
Family
ID=4105372
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NLAANVRAGE7702219,A NL186057C (en) | 1976-03-03 | 1977-03-02 | SIGNAL RECEIVER WORKING WITH SEVERAL FREQUENCIES FOR RECEIVING PRE-CERTAIN DOUBLE TONE SIGNALS. |
Country Status (11)
Country | Link |
---|---|
JP (1) | JPS52107708A (en) |
AU (1) | AU508271B2 (en) |
BE (1) | BE852056A (en) |
CA (1) | CA1031086A (en) |
DE (1) | DE2709370A1 (en) |
DK (1) | DK88877A (en) |
FR (1) | FR2343377A1 (en) |
GB (1) | GB1532103A (en) |
NL (1) | NL186057C (en) |
NO (1) | NO770696L (en) |
SE (1) | SE424129B (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5831140B2 (en) * | 1978-11-10 | 1983-07-04 | 株式会社日立製作所 | signal receiver |
DE3629907A1 (en) * | 1986-09-03 | 1988-03-10 | Standard Elektrik Lorenz Ag | SIGNALING RECEIVER |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3710031A (en) * | 1970-12-23 | 1973-01-09 | Itt | Multi frequency receiver |
FR2127450A5 (en) * | 1971-03-03 | 1972-10-13 | Ibm France | |
DE2116635C3 (en) * | 1971-04-05 | 1978-10-05 | Ibm Deutschland Gmbh, 7000 Stuttgart | Method for digital decoding of frequency-coded signals and circuit arrangement for carrying out the method |
CA976675A (en) * | 1972-10-16 | 1975-10-21 | Microsystems International Limited | Dual tone 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 |
-
1976
- 1976-03-03 CA CA247,035A patent/CA1031086A/en not_active Expired
-
1977
- 1977-02-18 AU AU22448/77A patent/AU508271B2/en not_active Expired
- 1977-02-23 GB GB7674/77A patent/GB1532103A/en not_active Expired
- 1977-03-01 DK DK88877A patent/DK88877A/en not_active Application Discontinuation
- 1977-03-01 NO NO770696A patent/NO770696L/en unknown
- 1977-03-01 JP JP2092077A patent/JPS52107708A/en active Pending
- 1977-03-02 NL NLAANVRAGE7702219,A patent/NL186057C/en not_active IP Right Cessation
- 1977-03-03 DE DE19772709370 patent/DE2709370A1/en not_active Ceased
- 1977-03-03 SE SE7702418A patent/SE424129B/en not_active IP Right Cessation
- 1977-03-03 BE BE175450A patent/BE852056A/en unknown
- 1977-03-03 FR FR7706234A patent/FR2343377A1/en active Granted
Also Published As
Publication number | Publication date |
---|---|
GB1532103A (en) | 1978-11-15 |
BE852056A (en) | 1977-07-01 |
NL7702219A (en) | 1977-09-06 |
CA1031086A (en) | 1978-05-09 |
AU2244877A (en) | 1978-08-24 |
JPS52107708A (en) | 1977-09-09 |
FR2343377A1 (en) | 1977-09-30 |
DE2709370A1 (en) | 1977-09-08 |
DK88877A (en) | 1977-09-04 |
AU508271B2 (en) | 1980-03-13 |
SE424129B (en) | 1982-06-28 |
NL186057B (en) | 1990-04-02 |
FR2343377B1 (en) | 1983-08-12 |
NO770696L (en) | 1977-09-06 |
SE7702418L (en) | 1977-09-04 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
BA | A request for search or an international-type search has been filed | ||
BB | A search report has been drawn up | ||
BC | A request for examination has been filed | ||
A85 | Still pending on 85-01-01 | ||
V1 | Lapsed because of non-payment of the annual fee |