FR2330223A1 - Dispositif automatique d'aiguillage de signaux bf - Google Patents

Dispositif automatique d'aiguillage de signaux bf

Info

Publication number
FR2330223A1
FR2330223A1 FR7533438A FR7533438A FR2330223A1 FR 2330223 A1 FR2330223 A1 FR 2330223A1 FR 7533438 A FR7533438 A FR 7533438A FR 7533438 A FR7533438 A FR 7533438A FR 2330223 A1 FR2330223 A1 FR 2330223A1
Authority
FR
France
Prior art keywords
telephone
microphone
line
automatic switching
circuit
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
FR7533438A
Other languages
English (en)
French (fr)
Other versions
FR2330223B1 (enrdf_load_stackoverflow
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to FR7533438A priority Critical patent/FR2330223A1/fr
Publication of FR2330223A1 publication Critical patent/FR2330223A1/fr
Application granted granted Critical
Publication of FR2330223B1 publication Critical patent/FR2330223B1/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H04B1/44—Transmit/receive switching
    • H04B1/46—Transmit/receive switching by voice-frequency signals; by pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H04B1/54—Circuits using the same frequency for two directions of communication
    • H04B1/58—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
FR7533438A 1975-10-31 1975-10-31 Dispositif automatique d'aiguillage de signaux bf Granted FR2330223A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7533438A FR2330223A1 (fr) 1975-10-31 1975-10-31 Dispositif automatique d'aiguillage de signaux bf

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7533438A FR2330223A1 (fr) 1975-10-31 1975-10-31 Dispositif automatique d'aiguillage de signaux bf

Publications (2)

Publication Number Publication Date
FR2330223A1 true FR2330223A1 (fr) 1977-05-27
FR2330223B1 FR2330223B1 (enrdf_load_stackoverflow) 1980-05-09

Family

ID=9161904

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7533438A Granted FR2330223A1 (fr) 1975-10-31 1975-10-31 Dispositif automatique d'aiguillage de signaux bf

Country Status (1)

Country Link
FR (1) FR2330223A1 (enrdf_load_stackoverflow)

Also Published As

Publication number Publication date
FR2330223B1 (enrdf_load_stackoverflow) 1980-05-09

Similar Documents

Publication Publication Date Title
GB1423577A (en) Loudspeaking telephone station circuit
EP0033744B1 (en) Voice controlled switching system
GB858678A (en) Loudspeaking telephone using transistors
ES409421A1 (es) Mejoras en los circuitos electronicos de aparato de abona- do.
SE8106157L (sv) Digital tva-till-fyrtradsomvandlare for fullduplexsignaler
US3146313A (en) Amplifier arrangement for loudspeaking telephones
US3075045A (en) Speakerphone
FR2456430A1 (fr) Terminal de circuit a quatre fils
FR2330223A1 (fr) Dispositif automatique d'aiguillage de signaux bf
US3908094A (en) Telephone transceiver with amplified microphone and speaker
US2166775A (en) Electronic amplifying coupler and system therefor
US2655557A (en) Apparatus for use in telephone or like communication systems
GB1395495A (en) Telephone conference amplifier
US2345046A (en) Intercommunicating system
FR2312145A1 (fr) Circuit pour servir d'interface entre deux parties d'une voie de communication
US3794782A (en) Pabx transmission and impulsing circuit
JPS561649A (en) Conference telephone equipment
US3172959A (en) Telephone amplifier
JPS57133755A (en) Branch coupling circuit for conference telephone set
FR2457041A1 (fr) Termineur pour installations telephoniques
GB779156A (en) A remote control device for use with apparatus incorporating a loud speaker
GB1047522A (en) Improvements in or relating to variable impedance electrical circuits
JPS60128762A (ja) 電話機回路
FR2355423A1 (fr) Equipement de ligne d'abonne pour central telephonique
GB853770A (en) Improvements in or relating to loudspeaking telephone systems

Legal Events

Date Code Title Description
ST Notification of lapse