BE536547A - - Google Patents
Info
- Publication number
- BE536547A BE536547A BE536547DA BE536547A BE 536547 A BE536547 A BE 536547A BE 536547D A BE536547D A BE 536547DA BE 536547 A BE536547 A BE 536547A
- 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
- H04M1/515—Devices for calling a subscriber by generating or selecting signals other than trains of pulses of similar shape, or signals other than currents of one or more different frequencies, e.g. generation of dc signals of alternating polarity, coded pulses or impedance dialling
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q3/00—Selecting arrangements
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Interface Circuits In Exchanges (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE331074X | 1954-04-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE536547A true BE536547A (en) |
Family
ID=6194540
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE536547D BE536547A (en) | 1954-04-05 |
Country Status (4)
| Country | Link |
|---|---|
| BE (1) | BE536547A (en) |
| CH (1) | CH331074A (en) |
| FR (1) | FR1137279A (en) |
| GB (1) | GB783637A (en) |
-
0
- BE BE536547D patent/BE536547A/xx unknown
-
1955
- 1955-03-04 CH CH331074D patent/CH331074A/en unknown
- 1955-03-26 FR FR1137279D patent/FR1137279A/en not_active Expired
- 1955-04-05 GB GB9984/55A patent/GB783637A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CH331074A (en) | 1958-06-30 |
| GB783637A (en) | 1957-09-25 |
| FR1137279A (en) | 1957-05-27 |