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JPS5643895A - Signal selection system - Google Patents

Signal selection system

Info

Publication number
JPS5643895A
JPS5643895A JP11899079A JP11899079A JPS5643895A JP S5643895 A JPS5643895 A JP S5643895A JP 11899079 A JP11899079 A JP 11899079A JP 11899079 A JP11899079 A JP 11899079A JP S5643895 A JPS5643895 A JP S5643895A
Authority
JP
Japan
Prior art keywords
controller
pulses
selective signal
signal selection
selection system
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
JP11899079A
Other languages
Japanese (ja)
Inventor
Fukuzo Mizuno
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 JP11899079A priority Critical patent/JPS5643895A/en
Publication of JPS5643895A publication Critical patent/JPS5643895A/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Monitoring And Testing Of Exchanges (AREA)

Abstract

PURPOSE:To perform stable operation, even if a selective signal is abnormal as to one system of a doubled controller, by the other controller by using a trains of pulses as the selective signal. CONSTITUTION:When the selective signal of controller CONT0 is at a high potential, AND circuit 1 outputs a train of connected pulses. Then, the output of retriggerable monostable multivibrator 8, when resistance 10 and capacitor 12 are adjusted to timing longer than the pulse period of its input, is constant as far as pulses are inputted continuously.
JP11899079A 1979-09-17 1979-09-17 Signal selection system Pending JPS5643895A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11899079A JPS5643895A (en) 1979-09-17 1979-09-17 Signal selection system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11899079A JPS5643895A (en) 1979-09-17 1979-09-17 Signal selection system

Publications (1)

Publication Number Publication Date
JPS5643895A true JPS5643895A (en) 1981-04-22

Family

ID=14750269

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11899079A Pending JPS5643895A (en) 1979-09-17 1979-09-17 Signal selection system

Country Status (1)

Country Link
JP (1) JPS5643895A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57204669A (en) * 1981-06-10 1982-12-15 Oki Electric Ind Co Ltd Duplication switching control system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57204669A (en) * 1981-06-10 1982-12-15 Oki Electric Ind Co Ltd Duplication switching control system
JPH0381342B2 (en) * 1981-06-10 1991-12-27 Oki Electric Ind Co Ltd

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