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)
  • Devices For Supply Of Signal Current (AREA)
  • Telephonic Communication Services (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
DE1159041B (en) 1963-12-12
BE622438A (en)
GB984580A (en) 1965-02-24
NL269292A (en)

Similar Documents

Publication Publication Date Title
CH400255A (en) Telephone system
CH433460A (en) Circuit arrangement for time division multiplex telephone switching systems
DK116520B (en) Electronic telephone system.
CH433459A (en) Automatic telecommunication exchange installation
CH401166A (en) Device for an automatic switching system
CH354809A (en) Device for an automatic telephony system
CH403848A (en) Memory circuit for ternary counting system
CH395205A (en) Circuit for an automatic telephone system
CH391007A (en) Circuit arrangement for an automatic telephone system
CH395199A (en) Circuit arrangement for an automatic switching system
BE596278A (en) Telephone system
CH394311A (en) Circuit arrangement for time division multiplex telephone switching systems
CH411051A (en) Signaling method for automatic telephone switching systems
CH409025A (en) Hybrid circuit for communication systems
AT238728B (en) Filter base for filter systems
CH411982A (en) Receiving system for electronic teleprinters
CH313271A (en) Circuit arrangement for an automatic telephone system
DK98073C (en) Automatic electronic telecommunication center.
AT218080B (en) Subscriber circuit for intercom systems
CH408127A (en) Circuit arrangement for an automatic telecommunications system
CH400253A (en) Automatic telephone system
CH439411A (en) Circuit arrangement for relay-controlled telephone extension systems
AT235408B (en) Step switch installation for transformers
CH422108A (en) Rotatable switching device for an HF device
AT238780B (en) Circuit arrangement for automatic billing