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JPS5610749A - Monitor device for coder and decoder - Google Patents

Monitor device for coder and decoder

Info

Publication number
JPS5610749A
JPS5610749A JP8624379A JP8624379A JPS5610749A JP S5610749 A JPS5610749 A JP S5610749A JP 8624379 A JP8624379 A JP 8624379A JP 8624379 A JP8624379 A JP 8624379A JP S5610749 A JPS5610749 A JP S5610749A
Authority
JP
Japan
Prior art keywords
pcm
circuit
supplied
signal
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
JP8624379A
Other languages
Japanese (ja)
Inventor
Yasuo Ito
Tomonori Okada
Masahiko Matsushita
Takashi Matsuda
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
NEC Corp
Nippon Telegraph and Telephone Corp
Original Assignee
Fujitsu Ltd
NEC Corp
Nippon Telegraph and Telephone 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 Fujitsu Ltd, NEC Corp, Nippon Telegraph and Telephone Corp, Nippon Electric Co Ltd filed Critical Fujitsu Ltd
Priority to JP8624379A priority Critical patent/JPS5610749A/en
Publication of JPS5610749A publication Critical patent/JPS5610749A/en
Pending legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04JMULTIPLEX COMMUNICATION
    • H04J3/00Time-division multiplex systems
    • H04J3/02Details
    • H04J3/14Monitoring arrangements

Landscapes

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

Abstract

PURPOSE:To secure the detection for the delicate analog element deterioration with the simple circuit constitution, by replacing the deterioration factor of the PCM end office equipment with the equivalent noise power. CONSTITUTION:The monitor PCM signal sent from reference level PCM pattern generating circuit 1 is multiplexed by received PCM signal 11 to be supplied to decoder 2. The PCM signal decoded by decoder 2 is delivered to receiving channel bus 12 and then supplied to analog returning circuit 5 with closure of receiving channel switch 4 to be held during one frame. On the other hand, transmitting channel switch 6 closes, and then the monitor PAM signal is sent to transmitting channel bus 13 to be coded by coder 8. This coded signal is supplied to error power integrating circuit 9. Circuit 9 measures the error power amount with the deviation given from the reference level PCM pattern of the monitor PCM signal used as the error input, and this power amount is supplied to threshold level detecting circuit 9-3. Thus the integrated amount is monitored.
JP8624379A 1979-07-06 1979-07-06 Monitor device for coder and decoder Pending JPS5610749A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8624379A JPS5610749A (en) 1979-07-06 1979-07-06 Monitor device for coder and decoder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8624379A JPS5610749A (en) 1979-07-06 1979-07-06 Monitor device for coder and decoder

Publications (1)

Publication Number Publication Date
JPS5610749A true JPS5610749A (en) 1981-02-03

Family

ID=13881360

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8624379A Pending JPS5610749A (en) 1979-07-06 1979-07-06 Monitor device for coder and decoder

Country Status (1)

Country Link
JP (1) JPS5610749A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5836043A (en) * 1981-08-26 1983-03-02 Nec Corp Testing system for digital signal device
JPH03216022A (en) * 1990-01-20 1991-09-24 Fujitsu Ltd Voice encoder/decoder
US10403601B2 (en) 2016-06-17 2019-09-03 Fairchild Semiconductor Corporation Semiconductor package and related methods

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5836043A (en) * 1981-08-26 1983-03-02 Nec Corp Testing system for digital signal device
JPH03216022A (en) * 1990-01-20 1991-09-24 Fujitsu Ltd Voice encoder/decoder
US10403601B2 (en) 2016-06-17 2019-09-03 Fairchild Semiconductor Corporation Semiconductor package and related methods

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