BE572410A - - Google Patents
Info
- Publication number
- BE572410A BE572410A BE572410DA BE572410A BE 572410 A BE572410 A BE 572410A BE 572410D A BE572410D A BE 572410DA BE 572410 A BE572410 A BE 572410A
- 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)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Interface Circuits In Exchanges (AREA)
- Monitoring And Testing Of Exchanges (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEST13096A DE1046109B (en) | 1957-10-26 | 1957-10-26 | Circuit arrangement for a telephone station for carrying out the key selection according to the voltage comparison method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE572410A true BE572410A (en) |
Family
ID=7455939
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE572410D BE572410A (en) | 1957-10-26 |
Country Status (4)
| Country | Link |
|---|---|
| BE (1) | BE572410A (en) |
| DE (1) | DE1046109B (en) |
| GB (1) | GB874254A (en) |
| NL (1) | NL232514A (en) |
-
0
- NL NL232514D patent/NL232514A/xx unknown
- BE BE572410D patent/BE572410A/xx unknown
-
1957
- 1957-10-26 DE DEST13096A patent/DE1046109B/en active Pending
-
1958
- 1958-10-24 GB GB3408458A patent/GB874254A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE1046109B (en) | 1958-12-11 |
| NL232514A (en) | |
| GB874254A (en) | 1961-08-02 |