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JPS57103464A - System for inter-call order of voice conference - Google Patents

System for inter-call order of voice conference

Info

Publication number
JPS57103464A
JPS57103464A JP17878380A JP17878380A JPS57103464A JP S57103464 A JPS57103464 A JP S57103464A JP 17878380 A JP17878380 A JP 17878380A JP 17878380 A JP17878380 A JP 17878380A JP S57103464 A JPS57103464 A JP S57103464A
Authority
JP
Japan
Prior art keywords
order
generator
scramblers
common
generator polynomial
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
JP17878380A
Other languages
Japanese (ja)
Inventor
Masami Koshikawa
Kazuo Murano
Yoshihiro Tomita
Fumio Amano
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP17878380A priority Critical patent/JPS57103464A/en
Publication of JPS57103464A publication Critical patent/JPS57103464A/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • H04M3/16—Automatic or semi-automatic exchanges with lock-out or secrecy provision in party-line systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)

Abstract

PURPOSE:To make the order between specific subscribers possible, by providing descramblers due to common and peculiar generator polynomials in each subscriber terminal in the voice conference system using a loop line. CONSTITUTION:Each subscriber terminal has scramblers 4a and 4b, which selects several generator polynomials, and descramblers 1a and 1b due to a generator polynomial common to all terminals and a generator polynomial peculiar to each terminal. In a general conference, information is scrambled and descrambled with the common generator polynomial. In the order between specific subscribers, a switch 11 is set to the (b) side to change generator polynomials of scramblers, and the order between subscriber terminals using scramblers of the same generator polynomial is executed, and other subscriber terminals cannot receive contents of the order.
JP17878380A 1980-12-19 1980-12-19 System for inter-call order of voice conference Pending JPS57103464A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17878380A JPS57103464A (en) 1980-12-19 1980-12-19 System for inter-call order of voice conference

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17878380A JPS57103464A (en) 1980-12-19 1980-12-19 System for inter-call order of voice conference

Publications (1)

Publication Number Publication Date
JPS57103464A true JPS57103464A (en) 1982-06-28

Family

ID=16054552

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17878380A Pending JPS57103464A (en) 1980-12-19 1980-12-19 System for inter-call order of voice conference

Country Status (1)

Country Link
JP (1) JPS57103464A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5500898A (en) * 1995-03-31 1996-03-19 Nec Corporation Scramble communication system multiplexing/demultiplexing scramble generation polynomial

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5500898A (en) * 1995-03-31 1996-03-19 Nec Corporation Scramble communication system multiplexing/demultiplexing scramble generation polynomial

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