NL54028C - - Google Patents
Info
- Publication number
- NL54028C NL54028C NL54028DA NL54028C NL 54028 C NL54028 C NL 54028C NL 54028D A NL54028D A NL 54028DA NL 54028 C NL54028 C NL 54028C
- Authority
- NL
- Netherlands
Links
Classifications
-
- 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
- H04Q1/442—Signalling arrangements; Manipulation of signalling currents using alternate current with out-of-voice band signalling frequencies
- H04Q1/4423—Signalling arrangements; Manipulation of signalling currents using alternate current with out-of-voice band signalling frequencies using one signalling frequency
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q3/00—Selecting arrangements
- H04Q3/0016—Arrangements providing connection between exchanges
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Sub-Exchange Stations And Push- Button Telephones (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH225462T | 1938-07-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL54028C true NL54028C (en:Method) |
Family
ID=4454053
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL54028D NL54028C (en:Method) | 1938-07-14 |
Country Status (2)
| Country | Link |
|---|---|
| CH (1) | CH225462A (en:Method) |
| NL (1) | NL54028C (en:Method) |
-
0
- NL NL54028D patent/NL54028C/xx active
-
1938
- 1938-07-14 CH CH225462D patent/CH225462A/de unknown
Also Published As
| Publication number | Publication date |
|---|---|
| CH225462A (de) | 1943-01-31 |