CS752581A1 - Schema telefonniho pristroje se zarizenim ke kontrolnimu poslechu a volnemu hovoru - Google Patents

Schema telefonniho pristroje se zarizenim ke kontrolnimu poslechu a volnemu hovoru

Info

Publication number
CS752581A1
CS752581A1 CS817525A CS752581A CS752581A1 CS 752581 A1 CS752581 A1 CS 752581A1 CS 817525 A CS817525 A CS 817525A CS 752581 A CS752581 A CS 752581A CS 752581 A1 CS752581 A1 CS 752581A1
Authority
CS
Czechoslovakia
Prior art keywords
zarizenim
volnemu
telefonniho
pristroje
poslechu
Prior art date
Application number
CS817525A
Other languages
Czech (cs)
Other versions
CS247107B1 (en
Inventor
Helmut Kammholz
Claus Peter Dipl Ing Kaufmann
Hans F Dipl Ing Strasser
Original Assignee
Helmut Kammholz
Kaufmann Claus Peter
Strasser Hans F
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 Helmut Kammholz, Kaufmann Claus Peter, Strasser Hans F filed Critical Helmut Kammholz
Publication of CS752581A1 publication Critical patent/CS752581A1/en
Publication of CS247107B1 publication Critical patent/CS247107B1/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • H04M9/08—Two-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)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Telephone Set Structure (AREA)
CS817525A 1980-12-23 1981-10-14 Circuit of a telephone set with equipment for loud hearing and individual connection CS247107B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DD22657380A DD154419A1 (en) 1980-12-23 1980-12-23 CIRCUIT ARRANGEMENT FOR A TELEPHONE DEVICE WITH MITHOER AND HANDSFREE DEVICE

Publications (2)

Publication Number Publication Date
CS752581A1 true CS752581A1 (en) 1985-06-13
CS247107B1 CS247107B1 (en) 1986-11-13

Family

ID=5528312

Family Applications (1)

Application Number Title Priority Date Filing Date
CS817525A CS247107B1 (en) 1980-12-23 1981-10-14 Circuit of a telephone set with equipment for loud hearing and individual connection

Country Status (6)

Country Link
CS (1) CS247107B1 (en)
CU (1) CU21478A3 (en)
DD (1) DD154419A1 (en)
DE (1) DE3129506A1 (en)
HU (1) HU187462B (en)
RO (1) RO85240B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3307552A1 (en) * 1983-03-03 1984-09-06 Hans Widmaier Fabrik für Apparate der Fernmelde- und Feinwerktechnik, 8000 München Circuit for howl suppression in telephone sets with loudspeaker amplifiers
DE3329476A1 (en) * 1983-08-16 1985-03-07 Telefonbau Und Normalzeit Gmbh, 6000 Frankfurt Circuit arrangement for switching on control devices of telephone sets
DE3505213A1 (en) * 1985-02-15 1986-08-21 Deutsche Fernsprecher Gesellschaft Mbh Marburg, 3550 Marburg Circuit in a telephone apparatus
DE4329638C2 (en) * 1993-09-02 1996-10-24 Telefunken Microelectron Loudspeaker
DE29614668U1 (en) 1996-08-24 1996-11-14 Kroos, Heinz Thomas, 33129 Delbrück Hands-free unit for mobile phones

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL155700B (en) * 1971-12-08 1978-01-16 Philips Nv SPEAKING TELEPHONE DEVICE.
DE2607016A1 (en) * 1976-02-19 1977-08-25 Manfred Lau Telephone amplifier for both voice and call bell - has analog delay line to prevent acoustic feedback and transistor bell signal amplifier
FR2376576A1 (en) * 1976-12-31 1978-07-28 Girard J Philippe ADVANCED HANDS-FREE TELEPHONE STATIONS

Also Published As

Publication number Publication date
HU187462B (en) 1986-01-28
CU21478A3 (en) 1987-10-12
DE3129506C2 (en) 1989-09-07
DE3129506A1 (en) 1982-07-01
RO85240A (en) 1984-09-29
RO85240B (en) 1984-10-30
DD154419A1 (en) 1982-03-17
CS247107B1 (en) 1986-11-13

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