JPS5664535A - Coder/decoder monitor circuit - Google Patents

Coder/decoder monitor circuit

Info

Publication number
JPS5664535A
JPS5664535A JP13988079A JP13988079A JPS5664535A JP S5664535 A JPS5664535 A JP S5664535A JP 13988079 A JP13988079 A JP 13988079A JP 13988079 A JP13988079 A JP 13988079A JP S5664535 A JPS5664535 A JP S5664535A
Authority
JP
Japan
Prior art keywords
coder
alarm
circuit
decoder
input signal
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
JP13988079A
Other languages
Japanese (ja)
Other versions
JPS5931250B2 (en
Inventor
Toshinori Tsuboi
Hiroshi Nakahama
Shinji Hayashi
Takehiko Uno
Seiichiro Kozuka
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 JP54139880A priority Critical patent/JPS5931250B2/en
Publication of JPS5664535A publication Critical patent/JPS5664535A/en
Publication of JPS5931250B2 publication Critical patent/JPS5931250B2/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/02—Details
    • H04J3/14—Monitoring arrangements

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Analogue/Digital Conversion (AREA)
  • Time-Division Multiplex Systems (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)

Abstract

PURPOSE:To ensure a monitor for the decoder and coder without giving a decision between the call and noncall, by making use of the information itself passing through both the coder and decoder. CONSTITUTION:The ''1'' or ''0'' is delivered to the terminal 5 when the input signal is decided positive or negative respectively by the circuit 4 which decides the plus and minus of the input signal of a coder. When the input signal is approximate to zero, the ''1'' is delivered to the terminal 6. Then the transmission of alarm is inhibited by the alarm inhibiting circuit 13. At the same time, a compensation is given to the delay between the input and the output of the coder 2 by the delay elements 7 and 8. Thus the circuit 4 detects the coincidence between the plus and the minus of both the input and output signals of the coder 2, and the alarm is transmitted when no coincidence is obtained.
JP54139880A 1979-10-31 1979-10-31 Encoder-decoder supervisory circuit Expired JPS5931250B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP54139880A JPS5931250B2 (en) 1979-10-31 1979-10-31 Encoder-decoder supervisory circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP54139880A JPS5931250B2 (en) 1979-10-31 1979-10-31 Encoder-decoder supervisory circuit

Publications (2)

Publication Number Publication Date
JPS5664535A true JPS5664535A (en) 1981-06-01
JPS5931250B2 JPS5931250B2 (en) 1984-08-01

Family

ID=15255714

Family Applications (1)

Application Number Title Priority Date Filing Date
JP54139880A Expired JPS5931250B2 (en) 1979-10-31 1979-10-31 Encoder-decoder supervisory circuit

Country Status (1)

Country Link
JP (1) JPS5931250B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01155719A (en) * 1987-12-11 1989-06-19 Matsushita Electric Ind Co Ltd Voice coding and decoding device with monitor function

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01155719A (en) * 1987-12-11 1989-06-19 Matsushita Electric Ind Co Ltd Voice coding and decoding device with monitor function

Also Published As

Publication number Publication date
JPS5931250B2 (en) 1984-08-01

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