BE563171A - - Google Patents
Info
- Publication number
- BE563171A BE563171A BE563171DA BE563171A BE 563171 A BE563171 A BE 563171A BE 563171D A BE563171D A BE 563171DA BE 563171 A BE563171 A BE 563171A
- Authority
- BE
- Belgium
Links
Classifications
-
- 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
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/26—Devices for calling a subscriber
- H04M1/30—Devices which can set up and transmit only one digit at a time
- H04M1/50—Devices which can set up and transmit only one digit at a time by generating or selecting currents of predetermined frequencies or combinations of frequencies
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/40—Applications of speech amplifiers
-
- 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)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Interface Circuits In Exchanges (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB356496X | 1956-12-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE563171A true BE563171A (en:Method) |
Family
ID=10380062
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE563171D BE563171A (en:Method) | 1956-12-14 |
Country Status (4)
| Country | Link |
|---|---|
| BE (1) | BE563171A (en:Method) |
| CH (1) | CH356496A (en:Method) |
| DE (1) | DE1046115B (en:Method) |
| GB (1) | GB806086A (en:Method) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE521897A (en:Method) * | 1952-08-03 |
-
0
- BE BE563171D patent/BE563171A/xx unknown
-
1956
- 1956-12-14 GB GB38289/56A patent/GB806086A/en not_active Expired
-
1957
- 1957-11-21 CH CH356496D patent/CH356496A/de unknown
- 1957-12-14 DE DEI14102A patent/DE1046115B/de active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| CH356496A (de) | 1961-08-31 |
| GB806086A (en) | 1958-12-17 |
| DE1046115B (de) | 1958-12-11 |