NL7514138A - SPEAKING TELEPHONE SYSTEM. - Google Patents

SPEAKING TELEPHONE SYSTEM.

Info

Publication number
NL7514138A
NL7514138A NL7514138A NL7514138A NL7514138A NL 7514138 A NL7514138 A NL 7514138A NL 7514138 A NL7514138 A NL 7514138A NL 7514138 A NL7514138 A NL 7514138A NL 7514138 A NL7514138 A NL 7514138A
Authority
NL
Netherlands
Prior art keywords
telephone system
speaking telephone
speaking
telephone
Prior art date
Application number
NL7514138A
Other languages
Dutch (nl)
Original Assignee
Northern Electric Co
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 Northern Electric Co filed Critical Northern Electric Co
Publication of NL7514138A publication Critical patent/NL7514138A/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
    • H04M9/085—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic using digital techniques

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Analogue/Digital Conversion (AREA)
  • Control Of Amplification And Gain Control (AREA)
  • Transceivers (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
NL7514138A 1974-12-12 1975-12-04 SPEAKING TELEPHONE SYSTEM. NL7514138A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA215,876A CA996692A (en) 1974-12-12 1974-12-12 Digital control of a loudspeaking telephone system

Publications (1)

Publication Number Publication Date
NL7514138A true NL7514138A (en) 1976-06-15

Family

ID=4101835

Family Applications (1)

Application Number Title Priority Date Filing Date
NL7514138A NL7514138A (en) 1974-12-12 1975-12-04 SPEAKING TELEPHONE SYSTEM.

Country Status (9)

Country Link
JP (1) JPS5183709A (en)
CA (1) CA996692A (en)
DE (1) DE2555552A1 (en)
FR (1) FR2294595A1 (en)
GB (1) GB1519607A (en)
IT (1) IT1050035B (en)
NL (1) NL7514138A (en)
NO (1) NO754207L (en)
SE (1) SE414856B (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2659028C3 (en) * 1976-12-27 1979-05-31 Dasy Inter S.A., Genf (Schweiz) Circuit arrangement for preventing feedback
DE2952122A1 (en) * 1979-12-22 1981-06-25 Deutsche Itt Industries Gmbh, 7800 Freiburg Speech controlled telephonic communication channel - employing digital filters and comparators to set reception and transmission channel damping
JPS5797262A (en) * 1980-12-09 1982-06-16 Nippon Telegr & Teleph Corp <Ntt> Loud speaker telephone set system
GB2137458B (en) * 1983-03-01 1986-11-19 Standard Telephones Cables Ltd Digital handsfree telephone
GB2161047B (en) * 1984-06-28 1987-09-16 Stc Plc Improvements in telephone instruments
GB2174578B (en) * 1985-05-04 1988-11-09 Stc Plc Loud speaking telephone
GB2197166A (en) * 1986-11-07 1988-05-11 Storno As Controlling gain in speech-controlled telephones
EP0271948A3 (en) * 1986-12-16 1989-05-03 Alcatel N.V. Telecommunication circuit
DE4130045A1 (en) * 1991-09-10 1993-03-18 Standard Elektrik Lorenz Ag CIRCUIT ARRANGEMENT FOR THE DYNAMIC CONTROL OF A VOICE TERMINAL

Also Published As

Publication number Publication date
NO754207L (en) 1976-06-15
SE7514036L (en) 1976-06-14
IT1050035B (en) 1981-03-10
GB1519607A (en) 1978-08-02
JPS5183709A (en) 1976-07-22
DE2555552A1 (en) 1976-06-16
CA996692A (en) 1976-09-07
SE414856B (en) 1980-08-18
FR2294595A1 (en) 1976-07-09

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Legal Events

Date Code Title Description
BV The patent application has lapsed