BE494968A - - Google Patents
Info
- Publication number
- BE494968A BE494968A BE494968DA BE494968A BE 494968 A BE494968 A BE 494968A BE 494968D A BE494968D A BE 494968DA BE 494968 A BE494968 A BE 494968A
- 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)
- Interface Circuits In Exchanges (AREA)
- Telephonic Communication Services (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP38936A DE831416C (en) | 1949-04-05 | 1949-04-05 | Audio frequency signaling in telecommunications, in particular telephone systems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE494968A true BE494968A (en) |
Family
ID=27797498
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE494968D BE494968A (en) | 1949-04-05 |
Country Status (5)
| Country | Link |
|---|---|
| BE (1) | BE494968A (en) |
| CH (1) | CH285957A (en) |
| DE (1) | DE831416C (en) |
| FR (1) | FR1019909A (en) |
| GB (1) | GB695870A (en) |
-
0
- BE BE494968D patent/BE494968A/xx unknown
-
1949
- 1949-04-05 DE DEP38936A patent/DE831416C/en not_active Expired
-
1950
- 1950-03-29 CH CH285957D patent/CH285957A/en unknown
- 1950-04-05 GB GB8602/50A patent/GB695870A/en not_active Expired
- 1950-04-05 FR FR1019909D patent/FR1019909A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE831416C (en) | 1952-02-14 |
| GB695870A (en) | 1953-08-19 |
| CH285957A (en) | 1952-09-30 |
| FR1019909A (en) | 1953-01-29 |