JPS57147361A - Return testing system for four-wire system trunk line - Google Patents

Return testing system for four-wire system trunk line

Info

Publication number
JPS57147361A
JPS57147361A JP3207581A JP3207581A JPS57147361A JP S57147361 A JPS57147361 A JP S57147361A JP 3207581 A JP3207581 A JP 3207581A JP 3207581 A JP3207581 A JP 3207581A JP S57147361 A JPS57147361 A JP S57147361A
Authority
JP
Japan
Prior art keywords
relay
odt
line
return
equipment position
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
JP3207581A
Other languages
English (en)
Japanese (ja)
Other versions
JPH0152951B2 (enrdf_load_stackoverflow
Inventor
Hiroshi Taguchi
Mutsuo Ezaka
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
Original Assignee
Fujitsu 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 filed Critical Fujitsu Ltd
Priority to JP3207581A priority Critical patent/JPS57147361A/ja
Publication of JPS57147361A publication Critical patent/JPS57147361A/ja
Publication of JPH0152951B2 publication Critical patent/JPH0152951B2/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
    • H04M3/26—Arrangements for supervision, monitoring or testing with means for applying test signals or for measuring
    • H04M3/28—Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor
    • H04M3/32—Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor for lines between exchanges

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
JP3207581A 1981-03-06 1981-03-06 Return testing system for four-wire system trunk line Granted JPS57147361A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3207581A JPS57147361A (en) 1981-03-06 1981-03-06 Return testing system for four-wire system trunk line

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3207581A JPS57147361A (en) 1981-03-06 1981-03-06 Return testing system for four-wire system trunk line

Publications (2)

Publication Number Publication Date
JPS57147361A true JPS57147361A (en) 1982-09-11
JPH0152951B2 JPH0152951B2 (enrdf_load_stackoverflow) 1989-11-10

Family

ID=12348753

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3207581A Granted JPS57147361A (en) 1981-03-06 1981-03-06 Return testing system for four-wire system trunk line

Country Status (1)

Country Link
JP (1) JPS57147361A (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS636951A (ja) * 1986-06-26 1988-01-12 Nec Corp デイジタル交換機のｐｃｍ回線障害切分け方式

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS636951A (ja) * 1986-06-26 1988-01-12 Nec Corp デイジタル交換機のｐｃｍ回線障害切分け方式

Also Published As

Publication number Publication date
JPH0152951B2 (enrdf_load_stackoverflow) 1989-11-10

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