JPS56149857A - Circuit switching system - Google Patents

Circuit switching system

Info

Publication number
JPS56149857A
JPS56149857A JP5309980A JP5309980A JPS56149857A JP S56149857 A JPS56149857 A JP S56149857A JP 5309980 A JP5309980 A JP 5309980A JP 5309980 A JP5309980 A JP 5309980A JP S56149857 A JPS56149857 A JP S56149857A
Authority
JP
Japan
Prior art keywords
control circuit
switching
circuit
fault
control
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
JP5309980A
Other languages
Japanese (ja)
Inventor
Hiroshi Sakai
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP5309980A priority Critical patent/JPS56149857A/en
Publication of JPS56149857A publication Critical patent/JPS56149857A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/42—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker
    • H04Q3/54—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker in which the logic circuitry controlling the exchange is centralised
    • H04Q3/545—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker in which the logic circuitry controlling the exchange is centralised using a stored programme
    • H04Q3/54575—Software application
    • H04Q3/54591—Supervision, e.g. fault localisation, traffic measurements, avoiding errors, failure recovery, monitoring, statistical analysis

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)

Abstract

PURPOSE:To efficiently execute the maintenance in case when a fault has occurred, by providing a switching control circuit for directly connecting a specific extension to a trunk in accordance with a switching control instruction from a processor, on every line control circuit. CONSTITUTION:When a fault occurs frequency at the time of transmission and receiving of a data between the central control unit and the respective control circuit, the control unit CC detects it and closes the control circuit. In this case, when either the line control circuit LTC0 or LTC1 is faulty, a switching circuit control instruction is sent to the corresponding switching control circuit CHC0 or CHC1. When the common control circuit is faulty as the switch control circuit SWC, the switching circuits which are always operated CHOL, CHOT or CH1L, CH1T are released by sending out the switching circuit control instruction to both CHC0 and CHC1, and a specific extension among the stored extensions which have become uncontrollable due to block of the fault control circuit is separated from the system and is directly connected to the trunk.
JP5309980A 1980-04-22 1980-04-22 Circuit switching system Pending JPS56149857A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5309980A JPS56149857A (en) 1980-04-22 1980-04-22 Circuit switching system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5309980A JPS56149857A (en) 1980-04-22 1980-04-22 Circuit switching system

Publications (1)

Publication Number Publication Date
JPS56149857A true JPS56149857A (en) 1981-11-19

Family

ID=12933333

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5309980A Pending JPS56149857A (en) 1980-04-22 1980-04-22 Circuit switching system

Country Status (1)

Country Link
JP (1) JPS56149857A (en)

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