FR778365A - - Google Patents
Info
- Publication number
- FR778365A FR778365A FR778365DA FR778365A FR 778365 A FR778365 A FR 778365A FR 778365D A FR778365D A FR 778365DA FR 778365 A FR778365 A FR 778365A
- Authority
- FR
- France
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
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
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR778365A true FR778365A (cs) | 1935-03-14 |
Family
ID=1552264
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR778365D Expired FR778365A (cs) |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR778365A (cs) |
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0
- FR FR778365D patent/FR778365A/fr not_active Expired