CH395205A - Circuit for an automatic telephone system - Google Patents

Circuit for an automatic telephone system

Info

Publication number
CH395205A
CH395205A CH1081162A CH1081162A CH395205A CH 395205 A CH395205 A CH 395205A CH 1081162 A CH1081162 A CH 1081162A CH 1081162 A CH1081162 A CH 1081162A CH 395205 A CH395205 A CH 395205A
Authority
CH
Switzerland
Prior art keywords
circuit
telephone system
automatic telephone
automatic
telephone
Prior art date
Application number
CH1081162A
Other languages
German (de)
Inventor
Reinier Van Der Veen Roelof
Original Assignee
Philips Nv
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 Philips Nv filed Critical Philips Nv
Publication of CH395205A publication Critical patent/CH395205A/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
    • 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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Telephonic Communication Services (AREA)
  • Devices For Supply Of Signal Current (AREA)
CH1081162A 1961-09-15 1962-09-12 Circuit for an automatic telephone system CH395205A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL269292 1961-09-15

Publications (1)

Publication Number Publication Date
CH395205A true CH395205A (en) 1965-07-15

Family

ID=19753285

Family Applications (1)

Application Number Title Priority Date Filing Date
CH1081162A CH395205A (en) 1961-09-15 1962-09-12 Circuit for an automatic telephone system

Country Status (5)

Country Link
BE (1) BE622438A (en)
CH (1) CH395205A (en)
DE (1) DE1159041B (en)
GB (1) GB984580A (en)
NL (1) NL269292A (en)

Also Published As

Publication number Publication date
GB984580A (en) 1965-02-24
BE622438A (en)
NL269292A (en)
DE1159041B (en) 1963-12-12

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