JPS5558655A - Extension number display system - Google Patents

Extension number display system

Info

Publication number
JPS5558655A
JPS5558655A JP13160478A JP13160478A JPS5558655A JP S5558655 A JPS5558655 A JP S5558655A JP 13160478 A JP13160478 A JP 13160478A JP 13160478 A JP13160478 A JP 13160478A JP S5558655 A JPS5558655 A JP S5558655A
Authority
JP
Japan
Prior art keywords
extension
board
main wire
route
circuit
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
JP13160478A
Other languages
Japanese (ja)
Inventor
Katsuyuki Jin
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 JP13160478A priority Critical patent/JPS5558655A/en
Publication of JPS5558655A publication Critical patent/JPS5558655A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/60—Semi-automatic systems, i.e. in which the numerical selection of the outgoing line is under the control of an operator
    • H04M3/64—Arrangements for signalling the number or class of the calling line to the operator

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)

Abstract

PURPOSE:To use the main wire number display function part, which is used conventionally, commonly to display an extension number by providing a circuit which interfaces the extension subscriber's number to the B board when the extension subscriber is connected to the B board in the telephone exchange. CONSTITUTION:When incoming to B board 8 through main wire trunk 5 exists and the operator operates a number displaying key for obtaining the main wire number, earth is sent to number expansion circuit 9 through the route of position circuit 7, board trunk 6 and control line (a), and the main wire number is sent to interface 10 and position register 11 and is displayed on B board 8. When the operator dials an extension number, it is stored in register 11 and is connected through route (2) by common control unit 4, and the extension subscriber's number operates the key again and wakes up number expansion circuit 9 through route (b) to display the extension number similarly to the main wire number, and the extension connected actually is displayed even if it is representative number.
JP13160478A 1978-10-27 1978-10-27 Extension number display system Pending JPS5558655A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13160478A JPS5558655A (en) 1978-10-27 1978-10-27 Extension number display system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13160478A JPS5558655A (en) 1978-10-27 1978-10-27 Extension number display system

Publications (1)

Publication Number Publication Date
JPS5558655A true JPS5558655A (en) 1980-05-01

Family

ID=15061936

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13160478A Pending JPS5558655A (en) 1978-10-27 1978-10-27 Extension number display system

Country Status (1)

Country Link
JP (1) JPS5558655A (en)

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