CH219526A - Arrangement for switching a telephone subscriber station from low-frequency two-wire operation to carrier-frequency two-way operation. - Google Patents

Arrangement for switching a telephone subscriber station from low-frequency two-wire operation to carrier-frequency two-way operation.

Info

Publication number
CH219526A
CH219526A CH219526DA CH219526A CH 219526 A CH219526 A CH 219526A CH 219526D A CH219526D A CH 219526DA CH 219526 A CH219526 A CH 219526A
Authority
CH
Switzerland
Prior art keywords
frequency
switching
carrier
arrangement
low
Prior art date
Application number
Other languages
German (de)
Inventor
Aktiengesellschaft C Lorenz
Original Assignee
Lorenz C 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 Lorenz C Ag filed Critical Lorenz C Ag
Publication of CH219526A publication Critical patent/CH219526A/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J1/00—Frequency-division multiplex systems
    • H04J1/02—Details
    • H04J1/08—Arrangements for combining channels
    • H04J1/085—Terminal station; Combined modulator and demodulator circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/78—Circuit arrangements in which low-frequency speech signals proceed in one direction on the line, while speech signals proceeding in the other direction on the line are modulated on a high-frequency carrier signal

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
CH219526D 1939-12-08 1940-11-04 Arrangement for switching a telephone subscriber station from low-frequency two-wire operation to carrier-frequency two-way operation. CH219526A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE219526X 1939-12-08

Publications (1)

Publication Number Publication Date
CH219526A true CH219526A (en) 1942-02-15

Family

ID=5831924

Family Applications (1)

Application Number Title Priority Date Filing Date
CH219526D CH219526A (en) 1939-12-08 1940-11-04 Arrangement for switching a telephone subscriber station from low-frequency two-wire operation to carrier-frequency two-way operation.

Country Status (5)

Country Link
US (1) US2330612A (en)
BE (1) BE439763A (en)
CH (1) CH219526A (en)
FR (1) FR868502A (en)
NL (1) NL56647C (en)

Also Published As

Publication number Publication date
FR868502A (en) 1942-01-05
US2330612A (en) 1943-09-28
NL56647C (en)
BE439763A (en)

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