JPS55117363A - Monitor device for pulse code communication unit - Google Patents

Monitor device for pulse code communication unit

Info

Publication number
JPS55117363A
JPS55117363A JP2479879A JP2479879A JPS55117363A JP S55117363 A JPS55117363 A JP S55117363A JP 2479879 A JP2479879 A JP 2479879A JP 2479879 A JP2479879 A JP 2479879A JP S55117363 A JPS55117363 A JP S55117363A
Authority
JP
Japan
Prior art keywords
pulse
circuit
communication unit
comparison
monitor
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
JP2479879A
Other languages
Japanese (ja)
Inventor
Masaaki Sasagawa
Hideyuki Kurosawa
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.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone Corp
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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP2479879A priority Critical patent/JPS55117363A/en
Publication of JPS55117363A publication Critical patent/JPS55117363A/en
Pending 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
    • H04L1/20—Arrangements for detecting or preventing errors in the information received using signal quality detector

Landscapes

  • Engineering & Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)
  • Time-Division Multiplex Systems (AREA)

Abstract

PURPOSE:To ensure the effective monitor for the coding unit of the pulse code modulation communication unit by inserting the monitor pulse into the common wiring and then giving the comparison between the state on the common wiring and that in the multiple signal. CONSTITUTION:In case the monitoring is given to the encoder or the decoder of the coding unit, the synchronous pulse is supplied to common wiring A from synchronous pulse input terminal 15 via insersion circuit 14 and then supplied to exclusive logic sum circuit 20 via common part 12 of the transmitter side. Then the comparison is given at circuit 20 between the original synchronous pulse and the synchronous pulse sent from part 12. And in case no coincidence is obtained through the comparison owing to occurrence of the fault at wiring A, the output of circuit 20 becomes ''1''. And the output of output terminal 18 shows ''1'', and the monitor signal is delivered. In the same way, the front and back state of the pulse at common part 13 are compared with each other at exclusive logic sum circuit 21 at the receiver side via the PCM signal sent from PCM input terminal 8. In this way, the encoding unit in the pulse code modulation communication unit can be monitored effectively.
JP2479879A 1979-03-02 1979-03-02 Monitor device for pulse code communication unit Pending JPS55117363A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2479879A JPS55117363A (en) 1979-03-02 1979-03-02 Monitor device for pulse code communication unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2479879A JPS55117363A (en) 1979-03-02 1979-03-02 Monitor device for pulse code communication unit

Publications (1)

Publication Number Publication Date
JPS55117363A true JPS55117363A (en) 1980-09-09

Family

ID=12148203

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2479879A Pending JPS55117363A (en) 1979-03-02 1979-03-02 Monitor device for pulse code communication unit

Country Status (1)

Country Link
JP (1) JPS55117363A (en)

Similar Documents

Publication Publication Date Title
CA2085751A1 (en) Device for monitoring a control unit
JPS55117363A (en) Monitor device for pulse code communication unit
JPS57173246A (en) Data transmission system
JPS5715548A (en) Polling monitor system
GB1117292A (en) Supervisory apparatus for telecommunication systems
JPS55150636A (en) Data transmitting unit
JPS5725734A (en) Party call receiver
JPS57138240A (en) Hairpin network
JPS55145460A (en) Communication terminal unit and its exchange network
JPS52123118A (en) Digital communication unit completed into duplicated reducdant circuit
JPS5781776A (en) Facsimile equipment
JPS5612145A (en) Supervisory system of pcm coding-decoding circuit
JPS553221A (en) Signal transmission/reception system
JPS5620362A (en) Error information system
JPS55162649A (en) Connection switching circuit
JPS553222A (en) Signal transmission/reception system
JPS52102607A (en) Remote device control system
JPS5614744A (en) Bus check system
JPS5721195A (en) Malfunction preventing circuit for opposing side monitoring relay in trunk
JPS57121344A (en) Transmission system alarm indication signal
JPS5459869A (en) Relay
JPS57160236A (en) Multiple transmission system for vehicle
JPS55147845A (en) Receiver monitoring system
JPS53101922A (en) Trouble supervisory system
JPS5299029A (en) Input/output interface control system

Legal Events

Date Code Title Description
A761 Written withdrawal of application

Free format text: JAPANESE INTERMEDIATE CODE: A761

Effective date: 20040305