JPS56152354A - Communication control system - Google Patents

Communication control system

Info

Publication number
JPS56152354A
JPS56152354A JP5471380A JP5471380A JPS56152354A JP S56152354 A JPS56152354 A JP S56152354A JP 5471380 A JP5471380 A JP 5471380A JP 5471380 A JP5471380 A JP 5471380A JP S56152354 A JPS56152354 A JP S56152354A
Authority
JP
Japan
Prior art keywords
communication
call detection
control device
control part
polarity
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
JP5471380A
Other languages
Japanese (ja)
Inventor
Yasuhiro Ogawa
Mamoru Chino
Saneyuki Hiwatari
Tetsuo Nishibashi
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP5471380A priority Critical patent/JPS56152354A/en
Publication of JPS56152354A publication Critical patent/JPS56152354A/en
Pending 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Use Of Switch Circuits For Exchanges And Methods Of Control Of Multiplex Exchanges (AREA)

Abstract

PURPOSE:To eliminate the influence due to useless start of the data terminal equipment, by causing the communication control device to ensure transmission of the signal polarity, which is instructed in the process of call detection, for the communication line through which the memory for call detection is instructed to transmit the signal. CONSTITUTION:Call detection control part 152 is provided in parallel with line exchange control part 51 and various control parts 55 of communication control device 5. Device 5 causes communication line 2 of the idle state to hold the signal polarity, which is trasmitted from terminal control device 3, in the A polarity by control part 152 which monitors all stored communication lines 2 at a constant period. As a result, data terminal equipment 1 is prevented from being started uselessly.
JP5471380A 1980-04-24 1980-04-24 Communication control system Pending JPS56152354A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5471380A JPS56152354A (en) 1980-04-24 1980-04-24 Communication control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5471380A JPS56152354A (en) 1980-04-24 1980-04-24 Communication control system

Publications (1)

Publication Number Publication Date
JPS56152354A true JPS56152354A (en) 1981-11-25

Family

ID=12978438

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5471380A Pending JPS56152354A (en) 1980-04-24 1980-04-24 Communication control system

Country Status (1)

Country Link
JP (1) JPS56152354A (en)

Similar Documents

Publication Publication Date Title
JPS57141158A (en) Communication control system
JPS52130219A (en) Transmission control system for call signal
JPS56152354A (en) Communication control system
JPS522133A (en) Connecting test control system in data communication system
JPS5715548A (en) Polling monitor system
JPS56112157A (en) Controlling method for channel assignment in loop communication system
JPS55137755A (en) Integrated communication system
JPS57212849A (en) Polling transmission system
JPS5646351A (en) Serial interface device
JPS54147717A (en) Signal system for facsimile transmission
JPS57194659A (en) Controlling system for transmission of information
JPS53123602A (en) Data transmission unit
JPS57161924A (en) Data gathering system
JPS53131707A (en) Auotmatic telephone exchange system
JPS55125763A (en) Automatic howler tone transmission system
JPS57143956A (en) Mutual communication system between half duplex and full duplex terminal
JPS54159101A (en) Communication control unit
JPS55117368A (en) Automatic telephone exchange
JPS53131706A (en) Automatic telephone exchange system
JPS57155637A (en) Terminal starting system
JPS5364404A (en) Semi-double communication system using printer
JPS57183156A (en) Special length frame transmitting system of communication controller
JPS6450642A (en) Bus system optical network controller
JPS5775057A (en) Meter pulse transmission system
JPS57180254A (en) Data transmission control method