CH424876A - Device for speaking and listening in on a four-wire telephone connection - Google Patents

Device for speaking and listening in on a four-wire telephone connection

Info

Publication number
CH424876A
CH424876A CH560361A CH560361A CH424876A CH 424876 A CH424876 A CH 424876A CH 560361 A CH560361 A CH 560361A CH 560361 A CH560361 A CH 560361A CH 424876 A CH424876 A CH 424876A
Authority
CH
Switzerland
Prior art keywords
listening
speaking
telephone connection
wire telephone
wire
Prior art date
Application number
CH560361A
Other languages
German (de)
Inventor
Jong Cornelis De
Original Assignee
Siemens Ag Albis
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 Siemens Ag Albis filed Critical Siemens Ag Albis
Publication of CH424876A publication Critical patent/CH424876A/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/42—Systems providing special services or facilities to subscribers
    • H04M3/56—Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/42—Systems providing special services or facilities to subscribers
    • H04M3/56—Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities
    • H04M3/568—Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities audio processing specific to telephonic conferencing, e.g. spatial distribution, mixing of participants

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Circuit For Audible Band Transducer (AREA)
CH560361A 1960-05-16 1961-05-12 Device for speaking and listening in on a four-wire telephone connection CH424876A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL251680 1960-05-16

Publications (1)

Publication Number Publication Date
CH424876A true CH424876A (en) 1966-11-30

Family

ID=19752351

Family Applications (1)

Application Number Title Priority Date Filing Date
CH560361A CH424876A (en) 1960-05-16 1961-05-12 Device for speaking and listening in on a four-wire telephone connection

Country Status (4)

Country Link
BE (1) BE603609A (en)
CH (1) CH424876A (en)
DE (1) DE1190050B (en)
NL (2) NL251680A (en)

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE825854C (en) * 1949-08-26 1951-12-20 Mix & Genest A G Speech switching for four-wire connection

Also Published As

Publication number Publication date
NL251680A (en)
DE1190050B (en) 1965-04-01
NL127682C (en)
BE603609A (en) 1961-09-01

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