JPH01139653U - - Google Patents

Info

Publication number
JPH01139653U
JPH01139653U JP3624288U JP3624288U JPH01139653U JP H01139653 U JPH01139653 U JP H01139653U JP 3624288 U JP3624288 U JP 3624288U JP 3624288 U JP3624288 U JP 3624288U JP H01139653 U JPH01139653 U JP H01139653U
Authority
JP
Japan
Prior art keywords
telephone line
current
circuit
incoming signal
backflow prevention
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
JP3624288U
Other languages
English (en)
Japanese (ja)
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 filed Critical
Priority to JP3624288U priority Critical patent/JPH01139653U/ja
Publication of JPH01139653U publication Critical patent/JPH01139653U/ja
Pending legal-status Critical Current

Links

Landscapes

  • Measurement Of Current Or Voltage (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
JP3624288U 1988-03-18 1988-03-18 Pending JPH01139653U (US20030199744A1-20031023-C00003.png)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3624288U JPH01139653U (US20030199744A1-20031023-C00003.png) 1988-03-18 1988-03-18

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3624288U JPH01139653U (US20030199744A1-20031023-C00003.png) 1988-03-18 1988-03-18

Publications (1)

Publication Number Publication Date
JPH01139653U true JPH01139653U (US20030199744A1-20031023-C00003.png) 1989-09-25

Family

ID=31262857

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3624288U Pending JPH01139653U (US20030199744A1-20031023-C00003.png) 1988-03-18 1988-03-18

Country Status (1)

Country Link
JP (1) JPH01139653U (US20030199744A1-20031023-C00003.png)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4496Y1 (US20030199744A1-20031023-C00003.png) * 1966-02-22 1969-01-07

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4496Y1 (US20030199744A1-20031023-C00003.png) * 1966-02-22 1969-01-07

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