NL297012A - - Google Patents
Info
- Publication number
- NL297012A NL297012A NL297012DA NL297012A NL 297012 A NL297012 A NL 297012A NL 297012D A NL297012D A NL 297012DA NL 297012 A NL297012 A NL 297012A
- 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
-
- 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 (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEST19626A DE1166288B (de) | 1962-08-23 | 1962-08-23 | Mehrfrequenz-Code-Signalverfahren und Schaltungsanordnung zu seiner Durchfuehrung |
| FR945054A FR1366483A (fr) | 1962-08-23 | 1963-08-20 | Méthode de signalisation à fréquences multiples |
| DEST21796A DE1211286B (de) | 1964-03-06 | 1964-03-06 | Mehrfrequenz-Code-Zwangslaufsignalverfahren mit Durchsignalisierung fuer Fernmelde-, insbesondere Fernsprechanlagen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL297012A true NL297012A (https=) |
Family
ID=27212463
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL297012D NL297012A (https=) | 1962-08-23 |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR1366483A (https=) |
| NL (1) | NL297012A (https=) |
-
0
- NL NL297012D patent/NL297012A/xx unknown
-
1963
- 1963-08-20 FR FR945054A patent/FR1366483A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR1366483A (fr) | 1964-07-10 |