NL275188A - - Google Patents

Info

Publication number
NL275188A
NL275188A NL275188DA NL275188A NL 275188 A NL275188 A NL 275188A NL 275188D A NL275188D A NL 275188DA NL 275188 A NL275188 A NL 275188A
Authority
NL
Netherlands
Application number
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.)
Publication of NL275188A publication Critical patent/NL275188A/xx

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L63/00—Network architectures or network communication protocols for network security
    • H04L63/10—Network architectures or network communication protocols for network security for controlling access to devices or network resources
    • H04L63/105—Multiple levels of security
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details
    • H04L12/22—Arrangements for preventing the taking of data from a data transmission channel without authorisation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
NL275188D 1961-02-23 NL275188A (xx)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US91087A US3130271A (en) 1961-02-23 1961-02-23 Communication classification system

Publications (1)

Publication Number Publication Date
NL275188A true NL275188A (xx)

Family

ID=22225985

Family Applications (1)

Application Number Title Priority Date Filing Date
NL275188D NL275188A (xx) 1961-02-23

Country Status (4)

Country Link
US (1) US3130271A (xx)
DE (1) DE1152446B (xx)
GB (1) GB980924A (xx)
NL (1) NL275188A (xx)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3654396A (en) * 1969-10-24 1972-04-04 Nicolaas Biezeveld Telephone screening system

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1991383A (en) * 1933-11-29 1935-02-19 Fator Charles Dibrell Party line telephone detector
US2333474A (en) * 1941-10-27 1943-11-02 Automatic Elect Lab Telephone system
US2496642A (en) * 1945-01-20 1950-02-07 Bell Telephone Labor Inc Subscriber telephone set double connection signal
DE1061384B (de) * 1955-01-19 1959-07-16 Josef Dirr Schaltungsanordnung zur UEbertragung einer Vielzahl von verschiedenen Steuer- und Berechtigungskennzeichen in Fernmelde-, insbesondere Fernsprech-nebenstellenanlagen
US2947819A (en) * 1958-03-13 1960-08-02 Gen Dynamics Corp Electronic switching telephone system
US2979570A (en) * 1959-08-31 1961-04-11 Gen Dynamics Corp Time division multiplex communication system

Also Published As

Publication number Publication date
US3130271A (en) 1964-04-21
DE1152446B (de) 1963-08-08
GB980924A (en) 1965-01-20

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