BE517550A - - Google Patents
Info
- Publication number
- BE517550A BE517550A BE517550DA BE517550A BE 517550 A BE517550 A BE 517550A BE 517550D A BE517550D A BE 517550DA BE 517550 A BE517550 A BE 517550A
- 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 |
|---|---|---|---|
| DE728859X | 1952-02-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE517550A true BE517550A (ja) |
Family
ID=6635828
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE517550D BE517550A (ja) | 1952-02-13 |
Country Status (3)
| Country | Link |
|---|---|
| BE (1) | BE517550A (ja) |
| FR (1) | FR1080545A (ja) |
| GB (1) | GB728859A (ja) |
-
0
- BE BE517550D patent/BE517550A/xx unknown
-
1953
- 1953-02-05 GB GB3332/53A patent/GB728859A/en not_active Expired
- 1953-02-13 FR FR1080545D patent/FR1080545A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR1080545A (fr) | 1954-12-09 |
| GB728859A (en) | 1955-04-27 |