CH256353A - Device for transmitting calls in a carrier frequency system. - Google Patents
Device for transmitting calls in a carrier frequency system.Info
- Publication number
- CH256353A CH256353A CH256353DA CH256353A CH 256353 A CH256353 A CH 256353A CH 256353D A CH256353D A CH 256353DA CH 256353 A CH256353 A CH 256353A
- Authority
- CH
- Switzerland
- Prior art keywords
- carrier frequency
- frequency system
- transmitting calls
- calls
- transmitting
- Prior art date
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
- H04J—MULTIPLEX COMMUNICATION
- H04J1/00—Frequency-division multiplex systems
- H04J1/02—Details
- H04J1/14—Arrangements providing for calling or supervisory signals
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Devices For Supply Of Signal Current (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEL5395D DE865327C (en) | 1938-08-05 | 1938-08-05 | Arrangement for call transmission in carrier frequency systems |
DEL95350D DE744288C (en) | 1938-08-05 | 1938-08-05 | Procedure for transferring calls in carrier frequency systems |
Publications (1)
Publication Number | Publication Date |
---|---|
CH256353A true CH256353A (en) | 1948-08-15 |
Family
ID=5966306
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH256353D CH256353A (en) | 1938-08-05 | 1944-03-21 | Device for transmitting calls in a carrier frequency system. |
Country Status (5)
Country | Link |
---|---|
BE (3) | BE435782A (en) |
CH (1) | CH256353A (en) |
DE (2) | DE744288C (en) |
FR (3) | FR858562A (en) |
NL (1) | NL56365C (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE482213A (en) * | 1947-04-29 |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB253697A (en) * | 1925-05-20 | 1926-06-24 | Western Electric Co | Improvements in signalling (ringing) arrangements for carrier wave systems |
-
1938
- 1938-08-05 DE DEL95350D patent/DE744288C/en not_active Expired
- 1938-08-05 DE DEL5395D patent/DE865327C/en not_active Expired
-
1939
- 1939-08-01 NL NL94589A patent/NL56365C/xx active
- 1939-08-01 FR FR858562D patent/FR858562A/en not_active Expired
- 1939-08-01 FR FR858561D patent/FR858561A/en not_active Expired
- 1939-08-02 BE BE435782D patent/BE435782A/xx unknown
- 1939-08-02 BE BE435783D patent/BE435783A/xx unknown
-
1944
- 1944-03-21 CH CH256353D patent/CH256353A/en unknown
- 1944-05-08 FR FR53610D patent/FR53610E/en not_active Expired
- 1944-06-07 BE BE456171D patent/BE456171A/xx unknown
Also Published As
Publication number | Publication date |
---|---|
FR858562A (en) | 1940-11-28 |
DE865327C (en) | 1953-02-02 |
DE744288C (en) | 1944-01-13 |
BE456171A (en) | 1944-07-31 |
FR858561A (en) | 1940-11-30 |
BE435783A (en) | 1939-09-30 |
BE435782A (en) | 1939-09-30 |
FR53610E (en) | 1946-06-21 |
NL56365C (en) | 1944-06-15 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
FR853355A (en) | Multiple phone system | |
FR51256E (en) | Advanced indicator system | |
FR856154A (en) | Advanced telephone system | |
CH211740A (en) | Device for transmitting calls in carrier frequency systems. | |
FR951376A (en) | Telephone system | |
CH256353A (en) | Device for transmitting calls in a carrier frequency system. | |
FR1031552A (en) | Telephony system | |
CH231804A (en) | Device for scanning films. | |
CH210688A (en) | Device on telephone sets with microtelephones. | |
CH209383A (en) | Adding machine for making lists. | |
CH227037A (en) | Two-way amplifier in a carrier frequency overhead line system. | |
FR855004A (en) | Modulator device | |
CH204089A (en) | Device for registering charges for telephone systems. | |
CH226557A (en) | Device for frequency multiplication. | |
AT178935B (en) | Electrical signal system for transmitting irregular waveforms | |
CH212950A (en) | Procedure for voltage-controlled frequency change. | |
FR837587A (en) | Secret telecommunications system | |
CH211741A (en) | Amplifier system in carrier frequency transmission systems. | |
CH214051A (en) | Carrier frequency transmission system. | |
DK58907C (en) | Device for multi-channel carrier frequency systems. | |
FR856889A (en) | Telecommunication system | |
FR853572A (en) | Telecommunication system | |
CH228587A (en) | Device for the transmission of messages. | |
FR842323A (en) | Transmission device for binders | |
FR856415A (en) | Automatic telephone system |