JPS55120255A - Communication controller - Google Patents

Communication controller

Info

Publication number
JPS55120255A
JPS55120255A JP2705879A JP2705879A JPS55120255A JP S55120255 A JPS55120255 A JP S55120255A JP 2705879 A JP2705879 A JP 2705879A JP 2705879 A JP2705879 A JP 2705879A JP S55120255 A JPS55120255 A JP S55120255A
Authority
JP
Japan
Prior art keywords
line
circuit
display
receiving line
receiving
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
JP2705879A
Other languages
Japanese (ja)
Inventor
Toshihiro Kamiyama
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 JP2705879A priority Critical patent/JPS55120255A/en
Publication of JPS55120255A publication Critical patent/JPS55120255A/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)
  • Computer And Data Communications (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Maintenance And Management Of Digital Transmission (AREA)

Abstract

PURPOSE:To enable circuit interface polarity conversion, display supervision or state hysteresis tracing by selecting a random circuit connecting mechanism at need and then by connecting a circuit interface polarity conversion switch and display element. CONSTITUTION:Circuit connecting mechanism 2-0-2-n are connected to common control circuit 1 via an interface IF line. To circuit IF polarity conversion IF terminal 7 of mechanisms 2-0-2-n to be tested and diagnosed, receiving line ''0'' set switch 9 and receiving line ''1'' set switch 10 are connected via receiving line ''0'' set line 701, receiving line ''1'' set line 702 and signal earth line 703, and to display supervisory IF terminal 8, display element 11 or a tracer is connected via display supervisory lines 801 and 802 for a transmitting line and receiving line and signal earth line 803. Consequently, the disconnection indication, connection indication, release request function operation, etc., can be confirmed through the manual operations of switches 9 and 10, and states of transmitting line 601 and receiving line 602 can be supervised by element 11.
JP2705879A 1979-03-08 1979-03-08 Communication controller Pending JPS55120255A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2705879A JPS55120255A (en) 1979-03-08 1979-03-08 Communication controller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2705879A JPS55120255A (en) 1979-03-08 1979-03-08 Communication controller

Publications (1)

Publication Number Publication Date
JPS55120255A true JPS55120255A (en) 1980-09-16

Family

ID=12210459

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2705879A Pending JPS55120255A (en) 1979-03-08 1979-03-08 Communication controller

Country Status (1)

Country Link
JP (1) JPS55120255A (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5239327A (en) * 1975-09-25 1977-03-26 Hitachi Ltd Interface tester
JPS52127003A (en) * 1976-04-19 1977-10-25 Hitachi Ltd Communication control device for switching lines
JPS5368503A (en) * 1976-11-30 1978-06-19 Mitsubishi Electric Corp Test unit for communication terminal unit

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5239327A (en) * 1975-09-25 1977-03-26 Hitachi Ltd Interface tester
JPS52127003A (en) * 1976-04-19 1977-10-25 Hitachi Ltd Communication control device for switching lines
JPS5368503A (en) * 1976-11-30 1978-06-19 Mitsubishi Electric Corp Test unit for communication terminal unit

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