BE466830A - - Google Patents

Info

Publication number
BE466830A
BE466830A BE466830DA BE466830A BE 466830 A BE466830 A BE 466830A BE 466830D A BE466830D A BE 466830DA BE 466830 A BE466830 A BE 466830A
Authority
BE
Belgium
Prior art keywords
circuit
relay
telephone
amplifiers
desc
Prior art date
Application number
Other languages
English (en)
French (fr)
Publication of BE466830A publication Critical patent/BE466830A/fr

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M9/00Arrangements for interconnection not involving centralised switching
    • H04M9/08Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Amplifiers (AREA)
BE466830D BE466830A (en:Method)

Publications (1)

Publication Number Publication Date
BE466830A true BE466830A (en:Method)

Family

ID=118033

Family Applications (1)

Application Number Title Priority Date Filing Date
BE466830D BE466830A (en:Method)

Country Status (1)

Country Link
BE (1) BE466830A (en:Method)

Similar Documents

Publication Publication Date Title
US2369351A (en) Telephone substation circuit
BE466830A (en:Method)
FR2642925A1 (fr) Systeme de commutation entre la telephonie avec reponse automatique et la reception de telecopie
FR2590430A1 (fr) Joncteur pour systeme telephonique
EP0298813B1 (fr) Appareil téléphonique public à connexion permanente
BE470231A (en:Method)
US2281255A (en) Telephone control circuits
US3168622A (en) Dial pulse repeater
BE690855A (en:Method)
US2043417A (en) Signaling system
US1982782A (en) Gas-filled tube circuit
US2264393A (en) Electric wave transmission system
BE466692A (en:Method)
CH143531A (fr) Installation téléphonique automatique à haute fréquence.
BE483535A (en:Method)
JP2001127875A (ja) 電話装置
BE569223A (en:Method)
BE383636A (en:Method)
BE476261A (en:Method)
BE333028A (en:Method)
JPS5937737A (ja) 受話音量自動調節回路
EP0632639A1 (fr) Télécopieur à contrôle du courant de boucle de ligne
BE528427A (en:Method)
JPS6170840A (ja) ボタン電話装置
CH120391A (fr) Installation téléphonique.