JPS57199353A - Test method for pcm terminal station - Google Patents

Test method for pcm terminal station

Info

Publication number
JPS57199353A
JPS57199353A JP56084337A JP8433781A JPS57199353A JP S57199353 A JPS57199353 A JP S57199353A JP 56084337 A JP56084337 A JP 56084337A JP 8433781 A JP8433781 A JP 8433781A JP S57199353 A JPS57199353 A JP S57199353A
Authority
JP
Japan
Prior art keywords
test
test board
circuits
circuit
channel
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
JP56084337A
Other languages
Japanese (ja)
Inventor
Toshikatsu Yasuda
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP56084337A priority Critical patent/JPS57199353A/en
Publication of JPS57199353A publication Critical patent/JPS57199353A/en
Pending 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)
  • Time-Division Multiplex Systems (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)

Abstract

PURPOSE:To execute various tests efficiently, by providing a reference encoder/ decoder and a channel selecting circuit, which selects a timing to be given to this encoder/decoder, on a test board and connecting this test board to a PCM terminal station only for test. CONSTITUTION:Transmitting and receiving logic boards 4 and 3 are connected to channel boards 1 and 2 which convert a voice V to a PCM signal, and a test board 5 is connected also. This test board 5 is provided with an A/D system testing circuit 15 and a D/A testing circuit 16, and timings to these circuits 15 and 16 are given from a receiving channel selecting circuit 10 and a transmission channel selecting circuit 11. In case that an decoding part D/A and an encoding part A/D of an encoding/decoding circuit 6 are tested, the test board 5 is connected through a test cable 9 to which a switch 8 is connected, and a digital or analog signal applied to the test channel is used as a test signal, and outputs of respective channels are compared with outputs of reference decoders or encoders of circuits 15 and 16 and are decided in deciding circuits 13 and 14.
JP56084337A 1981-06-03 1981-06-03 Test method for pcm terminal station Pending JPS57199353A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56084337A JPS57199353A (en) 1981-06-03 1981-06-03 Test method for pcm terminal station

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56084337A JPS57199353A (en) 1981-06-03 1981-06-03 Test method for pcm terminal station

Publications (1)

Publication Number Publication Date
JPS57199353A true JPS57199353A (en) 1982-12-07

Family

ID=13827684

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56084337A Pending JPS57199353A (en) 1981-06-03 1981-06-03 Test method for pcm terminal station

Country Status (1)

Country Link
JP (1) JPS57199353A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150254390A1 (en) * 2014-03-04 2015-09-10 International Business Machines Corporation Shared channel masks in on-product test compression system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150254390A1 (en) * 2014-03-04 2015-09-10 International Business Machines Corporation Shared channel masks in on-product test compression system
US9355203B2 (en) 2014-03-04 2016-05-31 International Business Machines Corporation Shared channel masks in on-product test compression system
US9378318B2 (en) * 2014-03-04 2016-06-28 International Business Machines Corporation Shared channel masks in on-product test compression system

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