CH353408A - Circuit arrangement for subscriber station in telecommunication systems, in particular telephone systems, with keypad selection - Google Patents

Circuit arrangement for subscriber station in telecommunication systems, in particular telephone systems, with keypad selection

Info

Publication number
CH353408A
CH353408A CH353408DA CH353408A CH 353408 A CH353408 A CH 353408A CH 353408D A CH353408D A CH 353408DA CH 353408 A CH353408 A CH 353408A
Authority
CH
Switzerland
Prior art keywords
systems
circuit arrangement
subscriber station
particular telephone
keypad selection
Prior art date
Application number
Other languages
German (de)
Inventor
Schnurr Josef Dr Phil
Original Assignee
Siemens 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 Siemens Ag filed Critical Siemens Ag
Publication of CH353408A publication Critical patent/CH353408A/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/26—Devices for calling a subscriber
    • H04M1/30—Devices which can set up and transmit only one digit at a time
    • H04M1/50—Devices which can set up and transmit only one digit at a time by generating or selecting currents of predetermined frequencies or combinations of frequencies
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Telephonic Communication Services (AREA)
  • Selective Calling Equipment (AREA)
CH353408D 1956-09-28 1957-09-24 Circuit arrangement for subscriber station in telecommunication systems, in particular telephone systems, with keypad selection CH353408A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES50618A DE1034701B (en) 1956-09-28 1956-09-28 Circuit arrangement for subscriber stations in telecommunications, especially telephone systems, with keypad selection

Publications (1)

Publication Number Publication Date
CH353408A true CH353408A (en) 1961-04-15

Family

ID=7487847

Family Applications (1)

Application Number Title Priority Date Filing Date
CH353408D CH353408A (en) 1956-09-28 1957-09-24 Circuit arrangement for subscriber station in telecommunication systems, in particular telephone systems, with keypad selection

Country Status (3)

Country Link
CH (1) CH353408A (en)
DE (1) DE1034701B (en)
GB (1) GB816700A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB961545A (en) * 1959-10-02
CH379583A (en) * 1960-03-22 1964-07-15 Autophon Ag Device for generating control criteria which are particularly suitable for the transmission of the choice in telephone systems
BE638253A (en) * 1962-10-05
DE1221297B (en) * 1964-09-25 1966-07-21 Siemens Ag Circuit arrangement for generating vibrations, in particular for alternating current keyboard selection in telecommunication systems, in particular telephone systems

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL31051C (en) * 1930-01-09

Also Published As

Publication number Publication date
DE1034701B (en) 1958-07-24
GB816700A (en) 1959-07-15

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