CH313062A - Device for switching call signals from one telephone set to another - Google Patents

Device for switching call signals from one telephone set to another

Info

Publication number
CH313062A
CH313062A CH313062DA CH313062A CH 313062 A CH313062 A CH 313062A CH 313062D A CH313062D A CH 313062DA CH 313062 A CH313062 A CH 313062A
Authority
CH
Switzerland
Prior art keywords
another
telephone set
call signals
switching call
switching
Prior art date
Application number
Other languages
German (de)
Inventor
Valdemar Alexandersson Harald
Original Assignee
Ericsson Telefon Ab L M
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 Ericsson Telefon Ab L M filed Critical Ericsson Telefon Ab L M
Publication of CH313062A publication Critical patent/CH313062A/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/08—Indicating faults in circuits or apparatus
    • H04M3/12—Marking faulty circuits "busy"; Enabling equipment to disengage itself from faulty circuits ; Using redundant circuits; Response of a circuit, apparatus or system to an error
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/71—Substation extension arrangements
    • H04M1/715—Substation extension arrangements using two or more extensions per line
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
    • H04M19/04—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone the ringing-current being generated at the substations

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
CH313062D 1952-05-05 1953-05-01 Device for switching call signals from one telephone set to another CH313062A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE313062X 1952-05-05

Publications (1)

Publication Number Publication Date
CH313062A true CH313062A (en) 1956-03-15

Family

ID=20307662

Family Applications (1)

Application Number Title Priority Date Filing Date
CH313062D CH313062A (en) 1952-05-05 1953-05-01 Device for switching call signals from one telephone set to another

Country Status (4)

Country Link
BE (1) BE519670A (en)
CH (1) CH313062A (en)
FR (1) FR1076687A (en)
NL (2) NL83319C (en)

Also Published As

Publication number Publication date
FR1076687A (en) 1954-10-28
NL178068B (en)
NL83319C (en)
BE519670A (en)

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