SE382293B - Telefonsvaranleggning. - Google Patents

Telefonsvaranleggning.

Info

Publication number
SE382293B
SE382293B SE7308899A SE7308899A SE382293B SE 382293 B SE382293 B SE 382293B SE 7308899 A SE7308899 A SE 7308899A SE 7308899 A SE7308899 A SE 7308899A SE 382293 B SE382293 B SE 382293B
Authority
SE
Sweden
Prior art keywords
telephone installation
telephone
installation
Prior art date
Application number
SE7308899A
Other languages
English (en)
Swedish (sv)
Inventor
Clair Kilby J St
Original Assignee
Clair Kilby J St
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 Clair Kilby J St filed Critical Clair Kilby J St
Publication of SE382293B publication Critical patent/SE382293B/xx

Links

Classifications

    • 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)
  • Telephonic Communication Services (AREA)
  • Prepayment Telephone Systems (AREA)
SE7308899A 1972-06-26 1973-06-25 Telefonsvaranleggning. SE382293B (sv)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US26649072A 1972-06-26 1972-06-26

Publications (1)

Publication Number Publication Date
SE382293B true SE382293B (sv) 1976-01-19

Family

ID=23014788

Family Applications (1)

Application Number Title Priority Date Filing Date
SE7308899A SE382293B (sv) 1972-06-26 1973-06-25 Telefonsvaranleggning.

Country Status (8)

Country Link
JP (1) JPS4952506A (de)
BE (1) BE801478A (de)
CA (1) CA984983A (de)
DE (1) DE2332244C2 (de)
GB (1) GB1432983A (de)
IT (1) IT986215B (de)
NL (1) NL7308862A (de)
SE (1) SE382293B (de)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5399802A (en) * 1977-02-14 1978-08-31 Nippon Telegr & Teleph Corp <Ntt> Specific subscriber calling equipment of automatic answering telephone set
JPS53132911A (en) * 1977-04-26 1978-11-20 Iwatsu Electric Co Ltd Telephone set
JPS53146511A (en) * 1977-05-26 1978-12-20 Toyo Communication Equip Caller identifying telephone set
JPS5648160U (de) * 1980-09-04 1981-04-28
DE3405014A1 (de) * 1984-02-13 1985-08-14 Telefonbau Und Normalzeit Gmbh, 6000 Frankfurt Verfahren fuer den betrieb eines telefon-anrufbeantworters
GB2183125B (en) * 1985-10-10 1989-11-29 Microcompass Ltd Improvements to communication apparatus
DE19511622A1 (de) 1995-03-30 1996-10-02 Michael Wolf Türrufbeantworter

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1283074A (fr) * 1961-03-08 1962-01-27 Installation téléphonique d'abonné
DE1437906B2 (de) * 1965-04-17 1970-03-26 Blessing, Dipl.-Kfm. Dr. Gerhard, 7336 Uhingen Schaltungsanordnung für eine Zusatzeinrichtung an Fernsprechteilnehmerstellen
JPS4831810A (de) * 1971-08-30 1973-04-26

Also Published As

Publication number Publication date
JPS4952506A (de) 1974-05-22
CA984983A (en) 1976-03-02
BE801478A (fr) 1973-10-15
IT986215B (it) 1975-01-20
DE2332244C2 (de) 1984-04-05
GB1432983A (en) 1976-04-22
NL7308862A (de) 1973-12-28
DE2332244A1 (de) 1974-01-17

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