BE470230A - - Google Patents

Info

Publication number
BE470230A
BE470230A BE470230DA BE470230A BE 470230 A BE470230 A BE 470230A BE 470230D A BE470230D A BE 470230DA BE 470230 A BE470230 A BE 470230A
Authority
BE
Belgium
Prior art keywords
circuit
channel
gain
transmission circuit
amplifier
Prior art date
Application number
Other languages
English (en)
French (fr)
Publication of BE470230A publication Critical patent/BE470230A/fr

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M1/00Substation equipment, e.g. for use by subscribers
    • H04M1/738Interface circuits for coupling substations to external telephone lines
    • H04M1/74Interface circuits for coupling substations to external telephone lines with means for reducing interference; with means for reducing effects due to line faults
    • 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)
BE470230D BE470230A (enrdf_load_stackoverflow)

Publications (1)

Publication Number Publication Date
BE470230A true BE470230A (enrdf_load_stackoverflow)

Family

ID=120459

Family Applications (1)

Application Number Title Priority Date Filing Date
BE470230D BE470230A (enrdf_load_stackoverflow)

Country Status (1)

Country Link
BE (1) BE470230A (enrdf_load_stackoverflow)

Similar Documents

Publication Publication Date Title
CA1279415C (en) Telephone line carrier system
US3046354A (en) Loud speaking telephone
CA2015055C (fr) Terminal videotex repondeur
BE470230A (enrdf_load_stackoverflow)
US2844659A (en) Two-way communication unit
EP0294303B1 (fr) Circuit pour poste téléphonique incorporant une protection contre les surcharges de tension
US3626101A (en) Loop extender for subscribers connected to a central office by abnormally long telephone lines
US3555190A (en) Automatic telephone conference connector
US1843189A (en) Radio telephone and telegraph system
US2264393A (en) Electric wave transmission system
US2391533A (en) Substation circuit
US2043417A (en) Signaling system
US1734729A (en) Measured service telephone system
BE438657A (enrdf_load_stackoverflow)
JP2001127875A (ja) 電話装置
CN1023178C (zh) 一种电话自动找人装置
FR2489632A1 (fr) Perfectionnement aux appareils telephoniques a haut-parleur
US3206544A (en) Data transmission system
JPH10257160A (ja) スピーカホン装置
JP2020048074A (ja) 給電回路、加入者回路、及び交換機
BE466692A (enrdf_load_stackoverflow)
BE417701A (enrdf_load_stackoverflow)
EP0936798A1 (fr) Télécopieur comportant des moyens de prise de ligne à alimentation secourue
BE438042A (enrdf_load_stackoverflow)
JPS60174556A (ja) 電話装置