FR1026594A - Method of transmission of selective pulses at vocal frequencies - Google Patents
Method of transmission of selective pulses at vocal frequenciesInfo
- Publication number
- FR1026594A FR1026594A FR1026594DA FR1026594A FR 1026594 A FR1026594 A FR 1026594A FR 1026594D A FR1026594D A FR 1026594DA FR 1026594 A FR1026594 A FR 1026594A
- Authority
- FR
- France
- Prior art keywords
- transmission
- selective pulses
- vocal frequencies
- vocal
- frequencies
- Prior art date
- 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
- H04Q1/45—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Selective Calling Equipment (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1026594X | 1949-10-26 | ||
DEM1121A DE825857C (en) | 1949-10-26 | 1949-10-27 | Method for the transmission of audio frequency dialing pulses |
Publications (1)
Publication Number | Publication Date |
---|---|
FR1026594A true FR1026594A (en) | 1953-04-29 |
Family
ID=25986497
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR1026594D Expired FR1026594A (en) | 1949-10-26 | 1950-10-26 | Method of transmission of selective pulses at vocal frequencies |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE825857C (en) |
FR (1) | FR1026594A (en) |
-
1949
- 1949-10-27 DE DEM1121A patent/DE825857C/en not_active Expired
-
1950
- 1950-10-26 FR FR1026594D patent/FR1026594A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
DE825857C (en) | 1951-12-20 |
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