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.)
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
Original Assignee
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 Nippon Telegraph and Telephone Corp, Nippon Electric Co LtdfiledCriticalNippon Telegraph and Telephone Corp
Priority to JP4016384ApriorityCriticalpatent/JPS60183866A/ja
Publication of JPS60183866ApublicationCriticalpatent/JPS60183866A/ja
Publication of JPH0310269B2publicationCriticalpatent/JPH0310269B2/ja
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
Landscapes
Engineering & Computer Science
(AREA)
Signal Processing
(AREA)
Arrangements For Transmission Of Measured Signals
(AREA)