FR2400294A1 - Transmission system sending facsimile signals to several receivers - operates using telephone network and has interface and amplifier circuits - Google Patents

Transmission system sending facsimile signals to several receivers - operates using telephone network and has interface and amplifier circuits

Info

Publication number
FR2400294A1
FR2400294A1 FR7724479A FR7724479A FR2400294A1 FR 2400294 A1 FR2400294 A1 FR 2400294A1 FR 7724479 A FR7724479 A FR 7724479A FR 7724479 A FR7724479 A FR 7724479A FR 2400294 A1 FR2400294 A1 FR 2400294A1
Authority
FR
France
Prior art keywords
interface
telephone network
transmission system
operates
amplifier circuits
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.)
Withdrawn
Application number
FR7724479A
Other languages
French (fr)
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.)
Alcatel CIT SA
Original Assignee
Alcatel CIT SA
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 Alcatel CIT SA filed Critical Alcatel CIT SA
Priority to FR7724479A priority Critical patent/FR2400294A1/en
Publication of FR2400294A1 publication Critical patent/FR2400294A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/32—Circuits or arrangements for control or supervision between transmitter and receiver or between image input and image output device, e.g. between a still-image camera and its memory or between a still-image camera and a printer device
    • H04N1/32037—Automation of particular transmitter jobs, e.g. multi-address calling, auto-dialing
    • H04N1/32064—Multi-address calling
    • H04N1/32069—Multi-address calling simultaneously to a plurality of destinations, e.g. multi-casting
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/32—Circuits or arrangements for control or supervision between transmitter and receiver or between image input and image output device, e.g. between a still-image camera and its memory or between a still-image camera and a printer device
    • H04N1/32037—Automation of particular transmitter jobs, e.g. multi-address calling, auto-dialing

Abstract

The transmission system, for sending facsimile signals to serveral receivers via a telephone network, has a coupling circuit (7) comprising a set of amplifiers (one for each line leading to wanted receivers). The coupling circuit connects the output of the facsimile transmitter (1) to the input of an interface (8) that connects the output channels of the amplifiers to the telephone network (RT). The interface has a keyboard to select the wanted telephone lines. Each amplifier is a differential type with a variable resistor in its feedback loop and is connected to the transmitter and to the interface via impedance transformers.
FR7724479A 1977-08-09 1977-08-09 Transmission system sending facsimile signals to several receivers - operates using telephone network and has interface and amplifier circuits Withdrawn FR2400294A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7724479A FR2400294A1 (en) 1977-08-09 1977-08-09 Transmission system sending facsimile signals to several receivers - operates using telephone network and has interface and amplifier circuits

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7724479A FR2400294A1 (en) 1977-08-09 1977-08-09 Transmission system sending facsimile signals to several receivers - operates using telephone network and has interface and amplifier circuits

Publications (1)

Publication Number Publication Date
FR2400294A1 true FR2400294A1 (en) 1979-03-09

Family

ID=9194394

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7724479A Withdrawn FR2400294A1 (en) 1977-08-09 1977-08-09 Transmission system sending facsimile signals to several receivers - operates using telephone network and has interface and amplifier circuits

Country Status (1)

Country Link
FR (1) FR2400294A1 (en)

Similar Documents

Publication Publication Date Title
GB2264844B (en) Signal interface for coupling a network front end circuit to a network adapter circuit
FI906449A0 (en) ARRANGEMANG FOER ATT BILDA EN RADIOTESTSLINGA.
GB1533266A (en) Equalization circuits
ES8105125A1 (en) Circuits and processes for initializing the loop current of a telephone set.
TW338871B (en) Pre-emphasis network with variable time delay
ES404359A1 (en) Amplifier circuit for transmission lines
US3060265A (en) Conference call circuit
FR2400294A1 (en) Transmission system sending facsimile signals to several receivers - operates using telephone network and has interface and amplifier circuits
US3453395A (en) Solid-state hybrid
KR850000161A (en) Telephone circuit
GB1515510A (en) Transmission networks for telephone system
GB842794A (en) Electrical equalizer circuit
GB1472374A (en) Broad band directional coupler
JPS56128062A (en) Branch and coupling amplifier circuit
FR2312145A1 (en) Telephone interface unit for conferences - generates signals representing transmission signals and has differential amplifiers
DE2960124D1 (en) Circuit arrangement for the ungrounded transmission of signals across points of isolation in communication systems
US3818140A (en) Telephone line receiver and transmitter
GB787824A (en) Improvements in or relating to circuits including electric signal transmission linesin communication systems
US3406357A (en) Compandor that supplies gain to the system
GB1047522A (en) Improvements in or relating to variable impedance electrical circuits
ES8301365A1 (en) Echo ultrasound examination device with multi-layer transducer
ES8204893A1 (en) Amplifier arrangement with very low distortion
IT1226171B (en) Duplex amplifier for intercom
GB1124351A (en) Improvements in or relating to electric circuits
JPS6439125A (en) Noise elimination system

Legal Events

Date Code Title Description
ST Notification of lapse