BE449342A - - Google Patents
Info
- Publication number
- BE449342A BE449342A BE449342DA BE449342A BE 449342 A BE449342 A BE 449342A BE 449342D A BE449342D A BE 449342DA BE 449342 A BE449342 A BE 449342A
- Authority
- BE
- Belgium
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
- H04Q1/446—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency
- H04Q1/4465—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency the same frequency being used for all signalling information, e.g. A.C. nr.9 system
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE892816X | 1942-02-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE449342A true BE449342A (fr) |
Family
ID=6846463
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE449342D BE449342A (fr) | 1942-02-13 |
Country Status (2)
| Country | Link |
|---|---|
| BE (1) | BE449342A (fr) |
| FR (1) | FR892816A (fr) |
-
0
- BE BE449342D patent/BE449342A/xx unknown
-
1943
- 1943-03-24 FR FR892816D patent/FR892816A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR892816A (fr) | 1944-05-22 |