JPS5644246A - Program loading state discrimination system - Google Patents

Program loading state discrimination system

Info

Publication number
JPS5644246A
JPS5644246A JP12016079A JP12016079A JPS5644246A JP S5644246 A JPS5644246 A JP S5644246A JP 12016079 A JP12016079 A JP 12016079A JP 12016079 A JP12016079 A JP 12016079A JP S5644246 A JPS5644246 A JP S5644246A
Authority
JP
Japan
Prior art keywords
loading state
program loading
exchange
circuit
transmission line
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.)
Granted
Application number
JP12016079A
Other languages
Japanese (ja)
Other versions
JPS6214982B2 (en
Inventor
Tomihisa Nishijima
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 JP12016079A priority Critical patent/JPS5644246A/en
Publication of JPS5644246A publication Critical patent/JPS5644246A/en
Publication of JPS6214982B2 publication Critical patent/JPS6214982B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/54—Store-and-forward switching systems 
    • H04L12/56—Packet switching systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
  • Exchange Systems With Centralized Control (AREA)

Abstract

PURPOSE:To discriminate the loading state, by transmitting a prescribed frame displaying the autonomous program loading state of the packet exchange to the network control station or the adjacent exchange and receiving this frame, when the packet exchange is in the autonomous program loading state. CONSTITUTION:Packet exchange 2 transmits data, which is indicated by control circuit 21, from parallel-series conversion transmission circuit 28 to interstation transmission line 6 or transmission line 5 for control, and transmits a flag sequence if data to be transmitted does not exists. When autonomous program loading from secondary memory 23 to primary memory 22 is executed in exchange 2 by short break, FF26 is set, and selector 27 is switched to the fixed pattern generating circuit 24 side, and pattern data of the frame displaying the program loading state is transmitted from circuit 28 to network control station 1 through transmission line 5 for control. Station 1 detects the fixed pattern and reports the program loading state of exchange 2 to control circuit 11 and displays this state to the machine interface.
JP12016079A 1979-09-20 1979-09-20 Program loading state discrimination system Granted JPS5644246A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12016079A JPS5644246A (en) 1979-09-20 1979-09-20 Program loading state discrimination system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12016079A JPS5644246A (en) 1979-09-20 1979-09-20 Program loading state discrimination system

Publications (2)

Publication Number Publication Date
JPS5644246A true JPS5644246A (en) 1981-04-23
JPS6214982B2 JPS6214982B2 (en) 1987-04-04

Family

ID=14779431

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12016079A Granted JPS5644246A (en) 1979-09-20 1979-09-20 Program loading state discrimination system

Country Status (1)

Country Link
JP (1) JPS5644246A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4521081B2 (en) * 2000-01-12 2010-08-11 株式会社東芝 X-ray tomographic imaging system

Also Published As

Publication number Publication date
JPS6214982B2 (en) 1987-04-04

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