IT8220451A0 - CIRCUIT ARRANGEMENT FOR A HANDS-FREE TELEPHONE SET. - Google Patents

CIRCUIT ARRANGEMENT FOR A HANDS-FREE TELEPHONE SET.

Info

Publication number
IT8220451A0
IT8220451A0 IT8220451A IT2045182A IT8220451A0 IT 8220451 A0 IT8220451 A0 IT 8220451A0 IT 8220451 A IT8220451 A IT 8220451A IT 2045182 A IT2045182 A IT 2045182A IT 8220451 A0 IT8220451 A0 IT 8220451A0
Authority
IT
Italy
Prior art keywords
hands
circuit arrangement
telephone set
free telephone
free
Prior art date
Application number
IT8220451A
Other languages
Italian (it)
Other versions
IT1151124B (en
Inventor
Armin Weyel
Original Assignee
Grothe & Soehne Kg A
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 Grothe & Soehne Kg A filed Critical Grothe & Soehne Kg A
Publication of IT8220451A0 publication Critical patent/IT8220451A0/en
Application granted granted Critical
Publication of IT1151124B publication Critical patent/IT1151124B/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
    • H04M9/10—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic with switching of direction of transmission by voice frequency

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
IT20451/82A 1981-03-31 1982-03-29 CIRCUIT PROVISION FOR A SPEAKER TELEPHONE IT1151124B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE3112764 1981-03-31

Publications (2)

Publication Number Publication Date
IT8220451A0 true IT8220451A0 (en) 1982-03-29
IT1151124B IT1151124B (en) 1986-12-17

Family

ID=6128847

Family Applications (1)

Application Number Title Priority Date Filing Date
IT20451/82A IT1151124B (en) 1981-03-31 1982-03-29 CIRCUIT PROVISION FOR A SPEAKER TELEPHONE

Country Status (2)

Country Link
CH (1) CH656999A5 (en)
IT (1) IT1151124B (en)

Also Published As

Publication number Publication date
IT1151124B (en) 1986-12-17
CH656999A5 (en) 1986-07-31

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