BE523338A - - Google Patents
Info
- Publication number
- BE523338A BE523338A BE523338DA BE523338A BE 523338 A BE523338 A BE 523338A BE 523338D A BE523338D A BE 523338DA BE 523338 A BE523338 A BE 523338A
- 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)
- Selective Calling Equipment (AREA)
- Burglar Alarm Systems (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB254852A GB701622A (en) | 1952-01-30 | 1952-01-30 | Improvements in and relating to voice frequency signal receivers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE523338A true BE523338A (en:Method) |
Family
ID=9741528
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE523338D BE523338A (en:Method) | 1952-01-30 |
Country Status (2)
| Country | Link |
|---|---|
| BE (1) | BE523338A (en:Method) |
| GB (1) | GB701622A (en:Method) |
-
0
- BE BE523338D patent/BE523338A/xx unknown
-
1952
- 1952-01-30 GB GB254852A patent/GB701622A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB701622A (en) | 1953-12-30 |