JPS57135562A - Channel continuity test system - Google Patents

Channel continuity test system

Info

Publication number
JPS57135562A
JPS57135562A JP2199381A JP2199381A JPS57135562A JP S57135562 A JPS57135562 A JP S57135562A JP 2199381 A JP2199381 A JP 2199381A JP 2199381 A JP2199381 A JP 2199381A JP S57135562 A JPS57135562 A JP S57135562A
Authority
JP
Japan
Prior art keywords
subscriber
continuity test
circuit
extension number
continuity
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
JP2199381A
Other languages
English (en)
Other versions
JPH0147958B2 (ja
Inventor
Kunitoshi Otsuki
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
Original Assignee
NEC 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP2199381A priority Critical patent/JPS57135562A/ja
Publication of JPS57135562A publication Critical patent/JPS57135562A/ja
Publication of JPH0147958B2 publication Critical patent/JPH0147958B2/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
    • H04M3/30—Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor for subscriber's lines, for the local loop
    • H04M3/302—Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor for subscriber's lines, for the local loop using modulation techniques for copper pairs
    • H04M3/303—Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor for subscriber's lines, for the local loop using modulation techniques for copper pairs and using PCM multiplexers, e.g. pair gain systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
JP2199381A 1981-02-17 1981-02-17 Channel continuity test system Granted JPS57135562A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2199381A JPS57135562A (en) 1981-02-17 1981-02-17 Channel continuity test system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2199381A JPS57135562A (en) 1981-02-17 1981-02-17 Channel continuity test system

Publications (2)

Publication Number Publication Date
JPS57135562A true JPS57135562A (en) 1982-08-21
JPH0147958B2 JPH0147958B2 (ja) 1989-10-17

Family

ID=12070540

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2199381A Granted JPS57135562A (en) 1981-02-17 1981-02-17 Channel continuity test system

Country Status (1)

Country Link
JP (1) JPS57135562A (ja)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS555512A (en) * 1978-06-27 1980-01-16 Fujitsu Ltd Test system for communication path

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS555512A (en) * 1978-06-27 1980-01-16 Fujitsu Ltd Test system for communication path

Also Published As

Publication number Publication date
JPH0147958B2 (ja) 1989-10-17

Similar Documents

Publication Publication Date Title
GB1344001A (en) Communication systems
US3156775A (en) Telephone converter
JPS57135562A (en) Channel continuity test system
US3714378A (en) Special service speech transfer equipment for telephone exchange systems
JPS5613866A (en) Communication device
JPS61281664A (ja) デ−タテレホン端末試験装置
JPS57157671A (en) Automatic testing system for subscriber's circuit
JPS56115067A (en) Channel continuity test system
JPS57147361A (en) Return testing system for four-wire system trunk line
JPS6417549A (en) Network control unit
JPS57136850A (en) Fault accepting and testing system
US905854A (en) Testing system for telephone-lines.
JPS56122561A (en) Subscriber line concentration stage testing system
JPS5725787A (en) Control system of channel during service interruption
JPS57147360A (en) Testing system for interface part of digital switchboard
JPS57136849A (en) Remote subscriber line testing system
JPS54139414A (en) Line lead-in system
JPS56168464A (en) Automatic dialing device
JPS5795744A (en) Automatic line switching device for data communication device
JPS5636259A (en) Switchboard connection system
JPS57150263A (en) Continuity test system of digital board trunk
JPS56128089A (en) Hooking detection system of push-button telephone set
JPS57135561A (en) Test system for digital multiple trunk
GB644112A (en) Improvements in or relating to telephone systems
JPS5725768A (en) Power off circuit of telephone exchange