JPS542603A - Trunk originating control system - Google Patents

Trunk originating control system

Info

Publication number
JPS542603A
JPS542603A JP6668277A JP6668277A JPS542603A JP S542603 A JPS542603 A JP S542603A JP 6668277 A JP6668277 A JP 6668277A JP 6668277 A JP6668277 A JP 6668277A JP S542603 A JPS542603 A JP S542603A
Authority
JP
Japan
Prior art keywords
control system
originating control
trunk
trunk originating
time
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
JP6668277A
Other languages
Japanese (ja)
Inventor
Kensho Tsujino
Goro Hanada
Akihiro Usui
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 JP6668277A priority Critical patent/JPS542603A/en
Publication of JPS542603A publication Critical patent/JPS542603A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/58—Arrangements providing connection between main exchange and sub-exchange or satellite
    • H04Q3/62—Arrangements providing connection between main exchange and sub-exchange or satellite for connecting to private branch exchanges
    • H04Q3/625—Arrangements in the private branch exchange

Landscapes

  • Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)

Abstract

PURPOSE:To prevent unjustifiable toll originating dialing easily and economically, by providing a dial-time supervisory relay and time-difference detection relay to a PBX.
JP6668277A 1977-06-08 1977-06-08 Trunk originating control system Pending JPS542603A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6668277A JPS542603A (en) 1977-06-08 1977-06-08 Trunk originating control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6668277A JPS542603A (en) 1977-06-08 1977-06-08 Trunk originating control system

Publications (1)

Publication Number Publication Date
JPS542603A true JPS542603A (en) 1979-01-10

Family

ID=13322934

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6668277A Pending JPS542603A (en) 1977-06-08 1977-06-08 Trunk originating control system

Country Status (1)

Country Link
JP (1) JPS542603A (en)

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