NL57012C - - Google Patents

Info

Publication number
NL57012C
NL57012C NL57012DC NL57012C NL 57012 C NL57012 C NL 57012C NL 57012D C NL57012D C NL 57012DC NL 57012 C NL57012 C NL 57012C
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 NL57012C publication Critical patent/NL57012C/xx

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details
    • H04L12/16—Arrangements for providing special services to substations
    • H04L12/18—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/42—Systems providing special services or facilities to subscribers
    • H04M3/56—Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/42—Systems providing special services or facilities to subscribers
    • H04M3/42221—Conversation recording systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Telephonic Communication Services (AREA)
NL57012D 1942-05-02 NL57012C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL309354X 1942-05-02

Publications (1)

Publication Number Publication Date
NL57012C true NL57012C (en)

Family

ID=19783577

Family Applications (1)

Application Number Title Priority Date Filing Date
NL57012D NL57012C (en) 1942-05-02

Country Status (5)

Country Link
BE (1) BE483450A (en)
CH (1) CH309354A (en)
DE (1) DE851825C (en)
FR (1) FR958997A (en)
NL (1) NL57012C (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE548354A (en) * 1955-06-06

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL50287C (en) * 1935-07-24
US2149386A (en) * 1936-04-02 1939-03-07 Teletype Corp Intercommunicating and broadcasting switchboard
BE428135A (en) * 1937-05-21

Also Published As

Publication number Publication date
CH309354A (en) 1955-08-31
BE483450A (en)
DE851825C (en) 1952-10-09
FR958997A (en) 1950-03-22

Similar Documents

Publication Publication Date Title
FR958997A (en)
BE445632A (en)
NL60583C (en)
NL122812C (en)
NL107381B (en)
BE453664A (en)
BE453302A (en)
BE450699A (en)
BE446591A (en)
BE446560A (en)
BE446464A (en)
BE446455A (en)
BE446420A (en)
BE446419A (en)
BE446396A (en)
BE446369A (en)
BE446368A (en)
BE446350A (en)
BE446348A (en)
BE446312A (en)
BE446135A (en)
BE446052A (en)
BE446040A (en)
BE446025A (en)
BE445949A (en)