NL169809C - SPEAKING TELEPHONE. - Google Patents

SPEAKING TELEPHONE.

Info

Publication number
NL169809C
NL169809C NLAANVRAGE7403286,A NL7403286A NL169809C NL 169809 C NL169809 C NL 169809C NL 7403286 A NL7403286 A NL 7403286A NL 169809 C NL169809 C NL 169809C
Authority
NL
Netherlands
Prior art keywords
speaking telephone
speaking
telephone
Prior art date
Application number
NLAANVRAGE7403286,A
Other languages
Dutch (nl)
Other versions
NL7403286A (en
NL169809B (en
Original Assignee
Northern Telecom Ltd
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 Telecom Ltd filed Critical Northern Telecom Ltd
Publication of NL7403286A publication Critical patent/NL7403286A/xx
Publication of NL169809B publication Critical patent/NL169809B/en
Application granted granted Critical
Publication of NL169809C publication Critical patent/NL169809C/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
    • 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)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
NLAANVRAGE7403286,A 1973-03-12 1974-03-12 SPEAKING TELEPHONE. NL169809C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA165,801A CA976677A (en) 1973-03-12 1973-03-12 Loudspeaking communication terminal apparatus and method of operation

Publications (3)

Publication Number Publication Date
NL7403286A NL7403286A (en) 1974-09-16
NL169809B NL169809B (en) 1982-03-16
NL169809C true NL169809C (en) 1982-08-16

Family

ID=4096059

Family Applications (1)

Application Number Title Priority Date Filing Date
NLAANVRAGE7403286,A NL169809C (en) 1973-03-12 1974-03-12 SPEAKING TELEPHONE.

Country Status (11)

Country Link
AU (1) AU476504B2 (en)
BE (1) BE812212A (en)
BR (1) BR7401879D0 (en)
CA (1) CA976677A (en)
FR (1) FR2221885B1 (en)
GB (1) GB1444828A (en)
IE (1) IE40708B1 (en)
IT (1) IT1025013B (en)
NL (1) NL169809C (en)
SE (1) SE400148B (en)
ZA (1) ZA741555B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4178548A (en) * 1976-10-04 1979-12-11 Geraldine E. Thompson Voice actuated mobile radio
DE2842369A1 (en) * 1978-09-28 1980-04-10 Siemens Ag CIRCUIT ARRANGEMENT FOR A VOICE-CONTROLLED SPEAKER STATION IN TELECOMMUNICATION, IN PARTICULAR TELEPHONE SYSTEMS
GB2174578B (en) * 1985-05-04 1988-11-09 Stc Plc Loud speaking telephone
FI73341C (en) * 1985-08-06 1987-09-10 Outel Oy MELLANFOERSTAERKARE SOM ANVAENDS I TVAOLEDNINGSFOERBINDELSER I ETT VALBART TELEFONNAET SAMT FOERFARANDE FOER REGLERING AV DESS FOERSTAERKNING.
CA1291837C (en) * 1987-07-15 1991-11-05 Juro Ohga Electronic telephone terminal having noise suppression function

Also Published As

Publication number Publication date
DE2411501A1 (en) 1974-10-10
IE40708B1 (en) 1979-08-01
AU6657974A (en) 1975-09-18
ZA741555B (en) 1975-02-26
FR2221885B1 (en) 1982-04-23
NL7403286A (en) 1974-09-16
GB1444828A (en) 1976-08-04
BE812212A (en) 1974-07-31
IT1025013B (en) 1978-08-10
NL169809B (en) 1982-03-16
SE400148B (en) 1978-03-13
DE2411501B2 (en) 1975-08-21
FR2221885A1 (en) 1974-10-11
BR7401879D0 (en) 1974-11-19
CA976677A (en) 1975-10-21
AU476504B2 (en) 1976-09-23

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Legal Events

Date Code Title Description
V1 Lapsed because of non-payment of the annual fee