JPS5570153A - Communication control unit - Google Patents

Communication control unit

Info

Publication number
JPS5570153A
JPS5570153A JP14396278A JP14396278A JPS5570153A JP S5570153 A JPS5570153 A JP S5570153A JP 14396278 A JP14396278 A JP 14396278A JP 14396278 A JP14396278 A JP 14396278A JP S5570153 A JPS5570153 A JP S5570153A
Authority
JP
Japan
Prior art keywords
circuit
control unit
test
controllability
communication control
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
JP14396278A
Other languages
English (en)
Japanese (ja)
Other versions
JPS5721893B2 (enrdf_load_stackoverflow
Inventor
Takao Kato
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 JP14396278A priority Critical patent/JPS5570153A/ja
Publication of JPS5570153A publication Critical patent/JPS5570153A/ja
Publication of JPS5721893B2 publication Critical patent/JPS5721893B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/24—Testing correct operation
    • H04L1/242—Testing correct operation by comparing a transmitted test signal with a locally generated replica
    • H04L1/243—Testing correct operation by comparing a transmitted test signal with a locally generated replica at the transmitter, using a loop-back

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Dc Digital Transmission (AREA)
  • Maintenance And Management Of Digital Transmission (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)
JP14396278A 1978-11-21 1978-11-21 Communication control unit Granted JPS5570153A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14396278A JPS5570153A (en) 1978-11-21 1978-11-21 Communication control unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14396278A JPS5570153A (en) 1978-11-21 1978-11-21 Communication control unit

Publications (2)

Publication Number Publication Date
JPS5570153A true JPS5570153A (en) 1980-05-27
JPS5721893B2 JPS5721893B2 (enrdf_load_stackoverflow) 1982-05-10

Family

ID=15351093

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14396278A Granted JPS5570153A (en) 1978-11-21 1978-11-21 Communication control unit

Country Status (1)

Country Link
JP (1) JPS5570153A (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6145655A (ja) * 1984-08-10 1986-03-05 Nec Corp 通信制御装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0386293U (enrdf_load_stackoverflow) * 1989-12-21 1991-08-30

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6145655A (ja) * 1984-08-10 1986-03-05 Nec Corp 通信制御装置

Also Published As

Publication number Publication date
JPS5721893B2 (enrdf_load_stackoverflow) 1982-05-10

Similar Documents

Publication Publication Date Title
ES8104648A1 (es) Conector de transicion para unir dos cables coaxiales dife- rentes
EP0145380A3 (en) Electrical apparatus for surface-and panel-mounting
EP0390376A3 (en) Process sensor simulators
JPS56149148A (en) Signal transmission system
JPS5570153A (en) Communication control unit
JPS5679551A (en) Bus line termination system
ES8507745A1 (es) Un circuito de linea con compensacion de eco, y un metodo para su ajuste.
JPS5685112A (en) Check system for electric circuit of car
JPS5537673A (en) Connection system of input-output device
JPS5771006A (en) Sequence controller
JPS57186855A (en) Optical communication system
JPS53133742A (en) Enclosed switchboard
JPS56169458A (en) Pulse signal transmission and reception circuit
JPS55105466A (en) Exchange system
JPS5592028A (en) Signal switching circuit
JPS5728494A (en) Private branch of exchange system
EP0160423A3 (en) Coaxial connector for controlled impedance transmission lines
JPS5559572A (en) Computer network structure system
JPS56157155A (en) Control system
JPS5593354A (en) Communication control unit
JPS57109446A (en) Data communication device
JPS56158551A (en) Data transmission controlling system
JPS5715552A (en) Line interface connecting device
JPS54116589A (en) Remote supervisory equipment
JPS52145680A (en) Signal wire disconnection circuit