JPS57143968A - Channel test system - Google Patents

Channel test system

Info

Publication number
JPS57143968A
JPS57143968A JP2840581A JP2840581A JPS57143968A JP S57143968 A JPS57143968 A JP S57143968A JP 2840581 A JP2840581 A JP 2840581A JP 2840581 A JP2840581 A JP 2840581A JP S57143968 A JPS57143968 A JP S57143968A
Authority
JP
Japan
Prior art keywords
channel
multifrequency
multifrequency signal
mfs
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
JP2840581A
Other languages
Japanese (ja)
Other versions
JPH0133998B2 (en
Inventor
Tatsuro Miyoshi
Hiroshi Oki
Kazuhiro Kasama
Kunihiro Kondo
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
Nippon Telegraph and Telephone Corp
Oki Electric Industry Co Ltd
Original Assignee
NEC Corp
Nippon Telegraph and Telephone Corp
Oki Electric Industry Co Ltd
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 Telegraph and Telephone Corp, Oki Electric Industry Co Ltd, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP2840581A priority Critical patent/JPS57143968A/en
Publication of JPS57143968A publication Critical patent/JPS57143968A/en
Publication of JPH0133998B2 publication Critical patent/JPH0133998B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/22—Arrangements for supervision, monitoring or testing
    • H04M3/24—Arrangements for supervision, monitoring or testing with provision for checking the normal operation
    • H04M3/244—Arrangements for supervision, monitoring or testing with provision for checking the normal operation for multiplex systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Monitoring And Testing Of Exchanges (AREA)

Abstract

PURPOSE:To confirm the normalcy of a channel without using any special testing jig by utilizing a multifrequency signal transmitter and a receiver equipped to a switchboard, and by using a multifrequency signal that they transmit and receive. CONSTITUTION:A central processor controls the closure of a channel extending from a multifrequency signal transmitter MFS to a multifrequency receiver MFR through a point P to be tested in a digital channel network TDNW. Under this control, the MFS sends out the multifrequency signal continuously for a certain time. This multifrequency signal is switched by, e.g., eight bits at each time at the point P of the closed channel, and the resulting signal is sent to and received by the MFS. During this testing operation, the MFR when the tested channel is normal receives a sent PCM multifrequency signal as it is in a bit sequence.
JP2840581A 1981-03-02 1981-03-02 Channel test system Granted JPS57143968A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2840581A JPS57143968A (en) 1981-03-02 1981-03-02 Channel test system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2840581A JPS57143968A (en) 1981-03-02 1981-03-02 Channel test system

Publications (2)

Publication Number Publication Date
JPS57143968A true JPS57143968A (en) 1982-09-06
JPH0133998B2 JPH0133998B2 (en) 1989-07-17

Family

ID=12247748

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2840581A Granted JPS57143968A (en) 1981-03-02 1981-03-02 Channel test system

Country Status (1)

Country Link
JP (1) JPS57143968A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6181499B1 (en) 1998-04-07 2001-01-30 International Business Machines Corporation Method and apparatus for testing the digital read channel circuit of a data storage device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5434706A (en) * 1977-08-05 1979-03-14 Int Standard Electric Corp Communication facility continuity tester
JPS5577268A (en) * 1978-12-07 1980-06-10 Toshiba Corp Channel test system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5434706A (en) * 1977-08-05 1979-03-14 Int Standard Electric Corp Communication facility continuity tester
JPS5577268A (en) * 1978-12-07 1980-06-10 Toshiba Corp Channel test system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6181499B1 (en) 1998-04-07 2001-01-30 International Business Machines Corporation Method and apparatus for testing the digital read channel circuit of a data storage device

Also Published As

Publication number Publication date
JPH0133998B2 (en) 1989-07-17

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