CH527530A - Circuit in a subscriber station provided with an automatic answering device in a telephone system - Google Patents

Circuit in a subscriber station provided with an automatic answering device in a telephone system

Info

Publication number
CH527530A
CH527530A CH67570A CH67570A CH527530A CH 527530 A CH527530 A CH 527530A CH 67570 A CH67570 A CH 67570A CH 67570 A CH67570 A CH 67570A CH 527530 A CH527530 A CH 527530A
Authority
CH
Switzerland
Prior art keywords
circuit
subscriber station
telephone system
station provided
answering device
Prior art date
Application number
CH67570A
Other languages
German (de)
Inventor
Gerardus Haas Johannes
Original Assignee
Oberholzer Max J Dr
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 Oberholzer Max J Dr filed Critical Oberholzer Max J Dr
Publication of CH527530A publication Critical patent/CH527530A/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/64—Automatic arrangements for answering calls; Automatic arrangements for recording messages for absent subscribers; Arrangements for recording conversations
    • H04M1/65—Recording arrangements for recording a message from the calling party
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/66—Substation equipment, e.g. for use by subscribers with means for preventing unauthorised or fraudulent calling
    • H04M1/663—Preventing unauthorised calls to a telephone set
    • H04M1/665—Preventing unauthorised calls to a telephone set by checking the validity of a code

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Signal Processing (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
  • Telephonic Communication Services (AREA)
CH67570A 1969-01-21 1970-01-19 Circuit in a subscriber station provided with an automatic answering device in a telephone system CH527530A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL6900963A NL6900963A (en) 1969-01-21 1969-01-21

Publications (1)

Publication Number Publication Date
CH527530A true CH527530A (en) 1972-08-31

Family

ID=19805922

Family Applications (1)

Application Number Title Priority Date Filing Date
CH67570A CH527530A (en) 1969-01-21 1970-01-19 Circuit in a subscriber station provided with an automatic answering device in a telephone system

Country Status (6)

Country Link
BE (1) BE744748A (en)
CH (1) CH527530A (en)
DE (1) DE2002160A1 (en)
FR (1) FR2028833A1 (en)
GB (1) GB1306701A (en)
NL (1) NL6900963A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3793487A (en) * 1971-11-22 1974-02-19 J Kilby System for screening telephone calls
JPS62163445A (en) * 1986-01-14 1987-07-20 Mitsubishi Electric Corp Telephone switching device

Also Published As

Publication number Publication date
DE2002160A1 (en) 1970-09-03
GB1306701A (en) 1973-02-14
NL6900963A (en) 1970-07-23
BE744748A (en) 1970-07-01
FR2028833A1 (en) 1970-10-16

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Legal Events

Date Code Title Description
PL Patent ceased