FR767357A - - Google Patents
Info
- Publication number
- FR767357A FR767357A FR767357DA FR767357A FR 767357 A FR767357 A FR 767357A FR 767357D A FR767357D A FR 767357DA FR 767357 A FR767357 A FR 767357A
- 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
- H04Q1/444—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)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR767357A true FR767357A (da) | 1934-07-16 |
Family
ID=1551413
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR767357D Expired FR767357A (da) |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR767357A (da) |
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0
- FR FR767357D patent/FR767357A/fr not_active Expired