IT1102025B - IDENTIFICATION DEVICE OF A COMPONENT IN AN ELECTRIC SIGNAL - Google Patents
IDENTIFICATION DEVICE OF A COMPONENT IN AN ELECTRIC SIGNALInfo
- Publication number
- IT1102025B IT1102025B IT47825/78A IT4782578A IT1102025B IT 1102025 B IT1102025 B IT 1102025B IT 47825/78 A IT47825/78 A IT 47825/78A IT 4782578 A IT4782578 A IT 4782578A IT 1102025 B IT1102025 B IT 1102025B
- Authority
- IT
- Italy
- Prior art keywords
- component
- electric signal
- identification device
- identification
- electric
- 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
- H04Q1/453—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)
- Telephonic Communication Services (AREA)
- Dc Digital Transmission (AREA)
- Monitoring And Testing Of Exchanges (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7702453A FR2379218A1 (en) | 1977-01-28 | 1977-01-28 | DEVICE FOR IDENTIFYING A COMPONENT IN AN ELECTRIC SIGNAL AND TELEPHONE NUMBERING RECEIVER USING SUCH A DEVICE |
Publications (2)
Publication Number | Publication Date |
---|---|
IT7847825A0 IT7847825A0 (en) | 1978-01-27 |
IT1102025B true IT1102025B (en) | 1985-10-07 |
Family
ID=9186031
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IT47825/78A IT1102025B (en) | 1977-01-28 | 1978-01-27 | IDENTIFICATION DEVICE OF A COMPONENT IN AN ELECTRIC SIGNAL |
Country Status (7)
Country | Link |
---|---|
BE (1) | BE863348A (en) |
DE (1) | DE2803641A1 (en) |
FR (1) | FR2379218A1 (en) |
GB (1) | GB1562168A (en) |
IT (1) | IT1102025B (en) |
NL (1) | NL7800883A (en) |
SE (1) | SE7800867L (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4339711A (en) * | 1979-07-10 | 1982-07-13 | Victor Company Of Japan, Ltd. | Spectrum displaying apparatus for multichannel signals |
CH655819A5 (en) * | 1981-11-26 | 1986-05-15 | Autophon Ag | EVALUATOR FOR DETECTING A SIGNAL OF A SPECIFIC FREQUENCY. |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3215934A (en) * | 1960-10-21 | 1965-11-02 | Sylvania Electric Prod | System for quantizing intelligence according to ratio of outputs of adjacent band-pass filters |
DE2361925A1 (en) * | 1973-12-13 | 1975-06-26 | Licentia Gmbh | Automatic frequency selection circuit - has several resonant circuits corresponding to number of frequencies |
-
1977
- 1977-01-28 FR FR7702453A patent/FR2379218A1/en active Granted
-
1978
- 1978-01-24 SE SE7800867A patent/SE7800867L/en unknown
- 1978-01-25 NL NL7800883A patent/NL7800883A/en not_active Application Discontinuation
- 1978-01-25 GB GB3069/78A patent/GB1562168A/en not_active Expired
- 1978-01-26 BE BE184655A patent/BE863348A/en unknown
- 1978-01-27 IT IT47825/78A patent/IT1102025B/en active
- 1978-01-27 DE DE19782803641 patent/DE2803641A1/en not_active Ceased
Also Published As
Publication number | Publication date |
---|---|
BE863348A (en) | 1978-05-16 |
IT7847825A0 (en) | 1978-01-27 |
GB1562168A (en) | 1980-03-05 |
SE7800867L (en) | 1978-07-29 |
NL7800883A (en) | 1978-08-01 |
FR2379218A1 (en) | 1978-08-25 |
DE2803641A1 (en) | 1978-08-24 |
FR2379218B1 (en) | 1982-02-12 |
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