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CH256355A - Facility for conference calls in telephone systems for noisy and noisy traffic. - Google Patents

Facility for conference calls in telephone systems for noisy and noisy traffic.

Info

Publication number
CH256355A
CH256355A CH256355DA CH256355A CH 256355 A CH256355 A CH 256355A CH 256355D A CH256355D A CH 256355DA CH 256355 A CH256355 A CH 256355A
Authority
CH
Switzerland
Prior art keywords
noisy
facility
traffic
telephone systems
conference calls
Prior art date
Application number
Other languages
German (de)
Inventor
Aktiengesellschaft Autophon
Original Assignee
Autophon Ag
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 Autophon Ag filed Critical Autophon Ag
Publication of CH256355A publication Critical patent/CH256355A/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
    • H04M1/6033—Substation equipment, e.g. for use by subscribers including speech amplifiers for providing handsfree use or a loudspeaker mode in telephone sets
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
CH256355D 1942-12-10 1942-12-10 Facility for conference calls in telephone systems for noisy and noisy traffic. CH256355A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH602333X 1942-12-10

Publications (1)

Publication Number Publication Date
CH256355A true CH256355A (en) 1948-08-15

Family

ID=4522824

Family Applications (1)

Application Number Title Priority Date Filing Date
CH256355D CH256355A (en) 1942-12-10 1942-12-10 Facility for conference calls in telephone systems for noisy and noisy traffic.

Country Status (2)

Country Link
CH (1) CH256355A (en)
GB (1) GB602333A (en)

Also Published As

Publication number Publication date
GB602333A (en) 1948-05-25

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