BE454346A - - Google Patents
Info
- Publication number
- BE454346A BE454346A BE454346DA BE454346A BE 454346 A BE454346 A BE 454346A BE 454346D A BE454346D A BE 454346DA BE 454346 A BE454346 A BE 454346A
- Authority
- BE
- Belgium
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M7/00—Arrangements for interconnection between switching centres
- H04M7/16—Arrangements for interconnection between switching centres in systems employing carrier frequencies
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J1/00—Frequency-division multiplex systems
- H04J1/02—Details
- H04J1/14—Arrangements providing for calling or supervisory signals
-
- 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
- H04Q1/442—Signalling arrangements; Manipulation of signalling currents using alternate current with out-of-voice band signalling frequencies
- H04Q1/4423—Signalling arrangements; Manipulation of signalling currents using alternate current with out-of-voice band signalling frequencies using one signalling frequency
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Radio Relay Systems (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR895971T | 1943-03-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE454346A true BE454346A (cs) |
Family
ID=32947442
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE454346D BE454346A (cs) | 1943-03-08 |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US2468555A (cs) |
| BE (1) | BE454346A (cs) |
| CH (1) | CH256130A (cs) |
| DE (1) | DE922775C (cs) |
| FR (1) | FR895971A (cs) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE973493C (de) * | 1950-09-28 | 1960-03-10 | Philips Nv | Einseitenbandtraegerfrequenzfernsprechsystem |
| NL92529C (cs) * | 1952-04-09 | |||
| BE551638A (cs) * | 1955-10-10 |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE347704A (cs) * | 1927-01-04 | |||
| US1748754A (en) * | 1927-08-12 | 1930-02-25 | Gen Electric | Signaling system |
| US2117721A (en) * | 1935-09-06 | 1938-05-17 | Siemens Ag | Telephone system |
| BE466622A (cs) * | 1943-01-14 |
-
0
- BE BE454346D patent/BE454346A/xx unknown
-
1943
- 1943-03-08 FR FR895971D patent/FR895971A/fr not_active Expired
- 1943-07-18 DE DEC3053D patent/DE922775C/de not_active Expired
-
1944
- 1944-03-02 CH CH256130D patent/CH256130A/fr unknown
-
1945
- 1945-11-06 US US627052A patent/US2468555A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| DE922775C (de) | 1955-01-24 |
| CH256130A (fr) | 1948-07-31 |
| US2468555A (en) | 1949-04-26 |
| FR895971A (fr) | 1945-02-08 |