FR2280141A1 - System of signalling between data processing centres - has seven frequency divider sub-assemblies, decoders and filters - Google Patents

System of signalling between data processing centres - has seven frequency divider sub-assemblies, decoders and filters

Info

Publication number
FR2280141A1
FR2280141A1 FR7426100A FR7426100A FR2280141A1 FR 2280141 A1 FR2280141 A1 FR 2280141A1 FR 7426100 A FR7426100 A FR 7426100A FR 7426100 A FR7426100 A FR 7426100A FR 2280141 A1 FR2280141 A1 FR 2280141A1
Authority
FR
France
Prior art keywords
signal
frequency
decoders
frequencies
predetermined
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.)
Granted
Application number
FR7426100A
Other languages
French (fr)
Other versions
FR2280141B1 (en
Inventor
Jacques Lautier
Michel Roland Breysse
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Thales SA
Original Assignee
Le Materiel Telephonique Thomson CSF
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Le Materiel Telephonique Thomson CSF filed Critical Le Materiel Telephonique Thomson CSF
Priority to FR7426100A priority Critical patent/FR2280141A1/en
Priority to ES439668A priority patent/ES439668A1/en
Publication of FR2280141A1 publication Critical patent/FR2280141A1/en
Application granted granted Critical
Publication of FR2280141B1 publication Critical patent/FR2280141B1/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/30—Systems using multi-frequency codes wherein each code element is represented by a combination of frequencies
    • 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
    • H04Q1/453—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling in which m-out-of-n signalling frequencies are transmitted

Abstract

Two equipments respectively associated with two data centres exchange under orders from the centres code and control signals. The code signal is formed by the addition of two approximately sinusoidal elementary signals whose fundamental frequencies are different and which are chosen from six predetermined frequencies f1-f6. The control signal is similar to an elementary signal, and has a predetermined fundamental frequency f7. Each equipment consists of a first arrangement of circuits having seven sub assembly frequency dividers (in a ratio N) and decoders fed by a signal of frequency F supplied by a quartz oscillator. These subassemblies deliver respectively a binary signal constituted by switching pulses representing, at frequency F divided by n.N. equal to one of the predetermined, frequencies f1-f7, the sequence of n first binary numbers. Seven filter sub assemblies identify the frequency of each elementary signal.
FR7426100A 1974-07-26 1974-07-26 System of signalling between data processing centres - has seven frequency divider sub-assemblies, decoders and filters Granted FR2280141A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FR7426100A FR2280141A1 (en) 1974-07-26 1974-07-26 System of signalling between data processing centres - has seven frequency divider sub-assemblies, decoders and filters
ES439668A ES439668A1 (en) 1974-07-26 1975-07-23 A signaling system between data process centers. (Machine-translation by Google Translate, not legally binding)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7426100A FR2280141A1 (en) 1974-07-26 1974-07-26 System of signalling between data processing centres - has seven frequency divider sub-assemblies, decoders and filters

Publications (2)

Publication Number Publication Date
FR2280141A1 true FR2280141A1 (en) 1976-02-20
FR2280141B1 FR2280141B1 (en) 1978-03-31

Family

ID=9141787

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7426100A Granted FR2280141A1 (en) 1974-07-26 1974-07-26 System of signalling between data processing centres - has seven frequency divider sub-assemblies, decoders and filters

Country Status (2)

Country Link
ES (1) ES439668A1 (en)
FR (1) FR2280141A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2362545A1 (en) * 1976-08-19 1978-03-17 Northern Telecom Ltd UNIVERSAL RECEIVER-TRANSMITTER OF TELEPHONE SIGNALING SIGNALS
FR2453575A1 (en) * 1979-04-06 1980-10-31 Cit Alcatel Multifrequency selection unit for telecommunication centre - has transmitter and receiver units connected to interface lines through switch circuits controlled by microprocessor
EP0277471A1 (en) * 1987-02-05 1988-08-10 Alcatel Bell-Sdt S.A. Method for the detection and correction of transmission errors

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3526858A (en) * 1967-03-22 1970-09-01 Siemens Ag Band filter of the n-path type
US3551857A (en) * 1967-04-11 1970-12-29 Siemens Ag Am-fm n-path filter arrangement with center frequency and band width adjustments
US3604947A (en) * 1965-10-23 1971-09-14 Aerojet General Co Variable filter device
FR2151815A5 (en) * 1971-08-27 1973-04-20 North American Rockwell
FR2191827A5 (en) * 1972-06-27 1974-02-01 Socotel Mixte D Veloppem

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3604947A (en) * 1965-10-23 1971-09-14 Aerojet General Co Variable filter device
US3526858A (en) * 1967-03-22 1970-09-01 Siemens Ag Band filter of the n-path type
US3551857A (en) * 1967-04-11 1970-12-29 Siemens Ag Am-fm n-path filter arrangement with center frequency and band width adjustments
FR2151815A5 (en) * 1971-08-27 1973-04-20 North American Rockwell
FR2191827A5 (en) * 1972-06-27 1974-02-01 Socotel Mixte D Veloppem

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2362545A1 (en) * 1976-08-19 1978-03-17 Northern Telecom Ltd UNIVERSAL RECEIVER-TRANSMITTER OF TELEPHONE SIGNALING SIGNALS
FR2453575A1 (en) * 1979-04-06 1980-10-31 Cit Alcatel Multifrequency selection unit for telecommunication centre - has transmitter and receiver units connected to interface lines through switch circuits controlled by microprocessor
EP0277471A1 (en) * 1987-02-05 1988-08-10 Alcatel Bell-Sdt S.A. Method for the detection and correction of transmission errors

Also Published As

Publication number Publication date
ES439668A1 (en) 1977-03-16
FR2280141B1 (en) 1978-03-31

Similar Documents

Publication Publication Date Title
US3657658A (en) Program control apparatus
US3838355A (en) Binary coded digital frequency synthesis
ES458221A1 (en) Current distribution arrangement for realizing a plurality of currents having a specific very accurately defined ratio relative to each other
US3404229A (en) System for reducing phase distortion in the phase reference signals of a multichannel phase-shift data system
FR2280141A1 (en) System of signalling between data processing centres - has seven frequency divider sub-assemblies, decoders and filters
GB1022977A (en) Improvements in and relating to digital apparatus
US4147891A (en) Arrangement for distribution of clock signals
US3077518A (en) Apparatus for camouflaging communication signals
US2902659A (en) Modulating system
US3875528A (en) Pseudo-independent noise generator
GB1129267A (en) Method and apparatus for controlling the frequency of a variable frequency oscillator
US3090923A (en) Logic system, using waves distinguishable as to frequency
US3320547A (en) Frequency synthesis
GB1064250A (en) Code checking circuit and multifrequency data receiver
ES385378A1 (en) Receivers for phase comparison radio navigation systems
GB935411A (en) Logical circuits
GB1446909A (en) Apparatus for the attenuation of undesired signals in complex- electrical signals
CH444237A (en) Circuit arrangement for a switching system operating on the time division multiplex principle with a switching station
SE319531B (en)
CH498527A (en) Tuning set for a carrier frequency lock for high voltage networks
DE1766797A1 (en) Electronic arrangement with several signal inputs and outputs
ES452873A1 (en) Wired television broadcasting systems
GB1242890A (en) Synchronous pulse transmission system
EP0262605B1 (en) Method and device for recording digital data on a magnetic record carrier
SU613350A1 (en) Pseudorandom signal generator

Legal Events

Date Code Title Description
ST Notification of lapse