BE624321A - - Google Patents

Info

Publication number
BE624321A
BE624321A BE624321DA BE624321A BE 624321 A BE624321 A BE 624321A BE 624321D A BE624321D A BE 624321DA BE 624321 A BE624321 A BE 624321A
Authority
BE
Belgium
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 BE624321A publication Critical patent/BE624321A/xx

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/04—Selecting arrangements for multiplex systems for time-division multiplexing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/30—Systems using multi-frequency codes wherein each code element is represented by a combination of frequencies

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Exchange Systems With Centralized Control (AREA)
BE624321D 1961-11-01 BE624321A (zh)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE1087061 1961-11-01

Publications (1)

Publication Number Publication Date
BE624321A true BE624321A (zh)

Family

ID=20292964

Family Applications (1)

Application Number Title Priority Date Filing Date
BE624321D BE624321A (zh) 1961-11-01

Country Status (2)

Country Link
US (1) US3231677A (zh)
BE (1) BE624321A (zh)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1211286B (de) * 1964-03-06 1966-02-24 Standard Elektrik Lorenz Ag Mehrfrequenz-Code-Zwangslaufsignalverfahren mit Durchsignalisierung fuer Fernmelde-, insbesondere Fernsprechanlagen
US3436486A (en) * 1965-12-21 1969-04-01 Bell Telephone Labor Inc Error detection system
US3557316A (en) * 1967-06-02 1971-01-19 Hitachi Ltd System for providing alternative connective paths in a common control switching apparatus
US4922515A (en) * 1989-07-25 1990-05-01 American Telephone And Telegraph Company Communication network cut-off detection arrangement

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2056265A (en) * 1935-08-13 1936-10-06 Beli Telephone Lab Inc Telephone system
US2807671A (en) * 1952-12-29 1957-09-24 Siemens Brothers & Co Ltd Automatic telephone systems
US2904636A (en) * 1955-12-22 1959-09-15 Bell Telephone Labor Inc Telephone circuit using magnetic cores

Also Published As

Publication number Publication date
US3231677A (en) 1966-01-25

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