JPS53901A - Telephone busy control system - Google Patents

Telephone busy control system

Info

Publication number
JPS53901A
JPS53901A JP7442976A JP7442976A JPS53901A JP S53901 A JPS53901 A JP S53901A JP 7442976 A JP7442976 A JP 7442976A JP 7442976 A JP7442976 A JP 7442976A JP S53901 A JPS53901 A JP S53901A
Authority
JP
Japan
Prior art keywords
control system
busy control
communication
telephone busy
telephone
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
JP7442976A
Other languages
Japanese (ja)
Inventor
Tsuguhiro Shimada
Susumu Obara
Tomihisa Nishijima
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP7442976A priority Critical patent/JPS53901A/en
Publication of JPS53901A publication Critical patent/JPS53901A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
    • H04M11/06—Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

PURPOSE:To improve the efficiency in exchange connection communication and exclusive line communication by enabling continuous communication between telephone sets at information communication terminals and between each of the terminals.
JP7442976A 1976-06-25 1976-06-25 Telephone busy control system Pending JPS53901A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7442976A JPS53901A (en) 1976-06-25 1976-06-25 Telephone busy control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7442976A JPS53901A (en) 1976-06-25 1976-06-25 Telephone busy control system

Publications (1)

Publication Number Publication Date
JPS53901A true JPS53901A (en) 1978-01-07

Family

ID=13546948

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7442976A Pending JPS53901A (en) 1976-06-25 1976-06-25 Telephone busy control system

Country Status (1)

Country Link
JP (1) JPS53901A (en)

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