NL28889C - - Google Patents
Info
- Publication number
- NL28889C NL28889C NL28889DA NL28889C NL 28889 C NL28889 C NL 28889C NL 28889D A NL28889D A NL 28889DA NL 28889 C NL28889 C NL 28889C
- 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
- H04Q1/444—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
- H04Q1/446—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency
- H04Q1/4465—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency the same frequency being used for all signalling information, e.g. A.C. nr.9 system
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR640678T | 1927-09-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL28889C true NL28889C (en:Method) |
Family
ID=8997621
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL28889D NL28889C (en:Method) | 1927-09-08 |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR640678A (en:Method) |
| NL (1) | NL28889C (en:Method) |
-
0
- NL NL28889D patent/NL28889C/xx active
-
1927
- 1927-09-08 FR FR640678D patent/FR640678A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR640678A (fr) | 1928-07-19 |