FR82199E - Improvements to multi-frequency signaling receiving systems - Google Patents
Improvements to multi-frequency signaling receiving systemsInfo
- Publication number
- FR82199E FR82199E FR908079A FR908079A FR82199E FR 82199 E FR82199 E FR 82199E FR 908079 A FR908079 A FR 908079A FR 908079 A FR908079 A FR 908079A FR 82199 E FR82199 E FR 82199E
- Authority
- FR
- France
- Prior art keywords
- receiving systems
- frequency signaling
- signaling receiving
- frequency
- systems
- 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.)
- Expired
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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/30—Systems using multi-frequency codes wherein each code element is represented by a combination of frequencies
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR908079A FR82199E (en) | 1961-08-30 | 1962-08-29 | Improvements to multi-frequency signaling receiving systems |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEST18261A DE1141348B (en) | 1961-08-30 | 1961-08-30 | Receiving device for an audio frequency code signal method with several signal frequency groups in telephone exchanges |
FR908079A FR82199E (en) | 1961-08-30 | 1962-08-29 | Improvements to multi-frequency signaling receiving systems |
Publications (1)
Publication Number | Publication Date |
---|---|
FR82199E true FR82199E (en) | 1964-01-04 |
Family
ID=25994054
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR908079A Expired FR82199E (en) | 1961-08-30 | 1962-08-29 | Improvements to multi-frequency signaling receiving systems |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR82199E (en) |
-
1962
- 1962-08-29 FR FR908079A patent/FR82199E/en not_active Expired
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