BE741286A - - Google Patents
Info
- Publication number
- BE741286A BE741286A BE741286DA BE741286A BE 741286 A BE741286 A BE 741286A BE 741286D A BE741286D A BE 741286DA BE 741286 A BE741286 A BE 741286A
- Authority
- BE
- Belgium
Links
Classifications
-
- 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
- H04Q—SELECTING
- H04Q3/00—Selecting arrangements
- H04Q3/0004—Selecting arrangements using crossbar selectors in the switching stages
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Telephonic Communication Services (AREA)
- Devices For Supply Of Signal Current (AREA)
- Interface Circuits In Exchanges (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE15002/68A SE331496B (cs) | 1968-11-05 | 1968-11-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE741286A true BE741286A (cs) | 1970-04-16 |
Family
ID=20299990
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE741286D BE741286A (cs) | 1968-11-05 | 1969-11-05 |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US3636269A (cs) |
| BE (1) | BE741286A (cs) |
| DE (1) | DE1954057C3 (cs) |
| FR (1) | FR2022652A1 (cs) |
| GB (1) | GB1281934A (cs) |
| NL (1) | NL6916697A (cs) |
| NO (1) | NO125210B (cs) |
| SE (1) | SE331496B (cs) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2162898A1 (de) * | 1971-06-22 | 1972-12-28 | Sits Soc It Telecom Siemens | Schaltungsanordnung zum Identifizieren von Gleichstromsignalen in einer Fernsprechanlage mit Tastenwahl |
| JPS5012913A (cs) * | 1973-06-04 | 1975-02-10 |
-
1968
- 1968-11-05 SE SE15002/68A patent/SE331496B/xx unknown
-
1969
- 1969-10-10 US US865279A patent/US3636269A/en not_active Expired - Lifetime
- 1969-10-20 NO NO4160/69A patent/NO125210B/no unknown
- 1969-10-22 DE DE1954057A patent/DE1954057C3/de not_active Expired
- 1969-11-04 GB GB54083/69A patent/GB1281934A/en not_active Expired
- 1969-11-05 FR FR6938119A patent/FR2022652A1/fr not_active Withdrawn
- 1969-11-05 BE BE741286D patent/BE741286A/xx unknown
- 1969-11-05 NL NL6916697A patent/NL6916697A/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| GB1281934A (en) | 1972-07-19 |
| US3636269A (en) | 1972-01-18 |
| DE1954057A1 (de) | 1970-06-18 |
| NL6916697A (cs) | 1970-05-08 |
| DE1954057C3 (de) | 1975-06-26 |
| SE331496B (cs) | 1971-01-04 |
| DE1954057B2 (de) | 1974-11-07 |
| NO125210B (cs) | 1972-07-31 |
| FR2022652A1 (cs) | 1970-07-31 |