NL263599A - - Google Patents
Info
- Publication number
- NL263599A NL263599A NL263599DA NL263599A NL 263599 A NL263599 A NL 263599A NL 263599D A NL263599D A NL 263599DA NL 263599 A NL263599 A NL 263599A
- Authority
- NL
- Netherlands
Links
Classifications
-
- 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
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- 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)
- Signal Processing (AREA)
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3131264X | 1960-04-13 | ||
| GB1312860A GB874380A (en) | 1960-04-13 | 1960-04-13 | Improvements in or relating to multi-frequency signalling receivers |
| GB1128895X | 1960-04-13 | ||
| FR858367A FR1286232A (fr) | 1960-04-13 | 1961-04-11 | Perfectionnements aux systèmes récepteurs de signalisations en multifréquences |
| DEST18261A DE1141348B (de) | 1961-08-30 | 1961-08-30 | Empfangseinrichtung fuer ein tonfrequentes Code-Signalverfahren mit mehreren Signalfrequenzgruppen in Fernsprechvermittlungsanlagen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL263599A true NL263599A (it) |
Family
ID=27512242
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL263599D NL263599A (it) | 1960-04-13 |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR1286232A (it) |
| NL (1) | NL263599A (it) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1451816A (en) * | 1972-12-29 | 1976-10-06 | Siemens Ag | Systems for monitoring the level of a received alternating- current signal and for indicating whether said received signal has a particular one of a plurality of predetermined frequencies |
| FR2272549A1 (en) * | 1974-05-21 | 1975-12-19 | Gabry Andre | Frequency coded signal receiving and decoding device - has channels with fixed frequency and converting circuits |
-
0
- NL NL263599D patent/NL263599A/xx unknown
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1961
- 1961-04-11 FR FR858367A patent/FR1286232A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR1286232A (fr) | 1962-03-02 |