CH121215A - Installation électrique d'intercommunication. - Google Patents

Installation électrique d'intercommunication.

Info

Publication number
CH121215A
CH121215A CH121215DA CH121215A CH 121215 A CH121215 A CH 121215A CH 121215D A CH121215D A CH 121215DA CH 121215 A CH121215 A CH 121215A
Authority
CH
Switzerland
Prior art keywords
intercommunication installation
electrical intercommunication
electrical
installation
intercommunication
Prior art date
Application number
Other languages
English (en)
French (fr)
Inventor
Co Bell Telephon Manufacturing
Original Assignee
Bell Telephone Mfg
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 Bell Telephone Mfg filed Critical Bell Telephone Mfg
Publication of CH121215A publication Critical patent/CH121215A/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/20—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Amplifiers (AREA)
  • Telephonic Communication Services (AREA)
CH121215D 1924-10-21 1925-01-13 Installation électrique d'intercommunication. CH121215A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2502124A GB246544A (en) 1924-10-21 1924-10-21 Improvements in two-way transmission systems with repeaters, particularly for telephone lines

Publications (1)

Publication Number Publication Date
CH121215A true CH121215A (fr) 1927-07-16

Family

ID=10220929

Family Applications (1)

Application Number Title Priority Date Filing Date
CH121215D CH121215A (fr) 1924-10-21 1925-01-13 Installation électrique d'intercommunication.

Country Status (5)

Country Link
CH (1) CH121215A (enrdf_load_stackoverflow)
DE (2) DE465039C (enrdf_load_stackoverflow)
FR (2) FR576661A (enrdf_load_stackoverflow)
GB (1) GB246544A (enrdf_load_stackoverflow)
NL (1) NL16260C (enrdf_load_stackoverflow)

Also Published As

Publication number Publication date
GB246544A (en) 1926-01-21
FR576661A (fr) 1924-08-25
DE465039C (de) 1928-09-11
FR29953E (fr) 1925-12-11
NL16260C (enrdf_load_stackoverflow) 1927-04-18
DE502244C (de) 1930-07-14

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