CH212745A - Circuit for call transmission. - Google Patents

Circuit for call transmission.

Info

Publication number
CH212745A
CH212745A CH212745DA CH212745A CH 212745 A CH212745 A CH 212745A CH 212745D A CH212745D A CH 212745DA CH 212745 A CH212745 A CH 212745A
Authority
CH
Switzerland
Prior art keywords
circuit
call transmission
call
transmission
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 CH212745A publication Critical patent/CH212745A/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details
    • H04Q1/30—Signalling arrangements; Manipulation of signalling currents
    • H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
    • H04Q1/444—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
    • H04Q1/446—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency
    • H04Q1/4465—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency the same frequency being used for all signalling information, e.g. A.C. nr.9 system

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
CH212745D 1939-01-25 1939-12-06 Circuit for call transmission. CH212745A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE212745X 1939-01-25

Publications (1)

Publication Number Publication Date
CH212745A true CH212745A (en) 1940-12-15

Family

ID=5809651

Family Applications (1)

Application Number Title Priority Date Filing Date
CH212745D CH212745A (en) 1939-01-25 1939-12-06 Circuit for call transmission.

Country Status (3)

Country Link
BE (1) BE437349A (en)
CH (1) CH212745A (en)
FR (1) FR868478A (en)

Also Published As

Publication number Publication date
FR868478A (en) 1941-12-31
BE437349A (en)

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