JPS5595490A - System switching system for exchange - Google Patents

System switching system for exchange

Info

Publication number
JPS5595490A
JPS5595490A JP263279A JP263279A JPS5595490A JP S5595490 A JPS5595490 A JP S5595490A JP 263279 A JP263279 A JP 263279A JP 263279 A JP263279 A JP 263279A JP S5595490 A JPS5595490 A JP S5595490A
Authority
JP
Japan
Prior art keywords
data switch
modification
gate memory
line gate
switching
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
JP263279A
Other languages
Japanese (ja)
Inventor
Tadashi Ihara
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 JP263279A priority Critical patent/JPS5595490A/en
Publication of JPS5595490A publication Critical patent/JPS5595490A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/04—Selecting arrangements for multiplex systems for time-division multiplexing

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Use Of Switch Circuits For Exchanges And Methods Of Control Of Multiplex Exchanges (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
  • Exchange Systems With Centralized Control (AREA)

Abstract

PURPOSE:To prevent hindrance to communication by changing systems after the modification of a line gate memory in a data switch when a changeover from an active system to a stand-by system. CONSTITUTION:Once fault detection circuit FDT3 detects a fault occurring to active ACT system, FDT3 sends system-switching request signal 6 to system supervisory circuit SCENT5. On receiving this signal, SCNT5 exercises a supervision over the state of data switch DS1 of the stand-by SBY system and after it is made sure that a line gate memory in this DS is not in process of modification, system switching unit EMA4 changes the ACT system of the data switch over to the SBY system. When the line gate memory in the data switch is in process, SCNT5 sends system-switching indication signal 7 out after the completion of the modification.
JP263279A 1979-01-12 1979-01-12 System switching system for exchange Pending JPS5595490A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP263279A JPS5595490A (en) 1979-01-12 1979-01-12 System switching system for exchange

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP263279A JPS5595490A (en) 1979-01-12 1979-01-12 System switching system for exchange

Publications (1)

Publication Number Publication Date
JPS5595490A true JPS5595490A (en) 1980-07-19

Family

ID=11534760

Family Applications (1)

Application Number Title Priority Date Filing Date
JP263279A Pending JPS5595490A (en) 1979-01-12 1979-01-12 System switching system for exchange

Country Status (1)

Country Link
JP (1) JPS5595490A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61284193A (en) * 1985-06-11 1986-12-15 Iwatsu Electric Co Ltd Duplexed switching controller
JPH06334485A (en) * 1993-05-19 1994-12-02 Nec Corp Three-stage switch device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61284193A (en) * 1985-06-11 1986-12-15 Iwatsu Electric Co Ltd Duplexed switching controller
JPH06334485A (en) * 1993-05-19 1994-12-02 Nec Corp Three-stage switch device

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