JP2521616Y2 - システム電話装置の故障判定器 - Google Patents

システム電話装置の故障判定器

Info

Publication number
JP2521616Y2
JP2521616Y2 JP7229290U JP7229290U JP2521616Y2 JP 2521616 Y2 JP2521616 Y2 JP 2521616Y2 JP 7229290 U JP7229290 U JP 7229290U JP 7229290 U JP7229290 U JP 7229290U JP 2521616 Y2 JP2521616 Y2 JP 2521616Y2
Authority
JP
Japan
Prior art keywords
modular
main
system telephone
modular jacks
different types
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.)
Expired - Lifetime
Application number
JP7229290U
Other languages
English (en)
Japanese (ja)
Other versions
JPH0431861U (enExample
Inventor
哲朗 佐藤
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.)
NTT Inc
Original Assignee
Nippon Telegraph and Telephone Corp
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 filed Critical Nippon Telegraph and Telephone Corp
Priority to JP7229290U priority Critical patent/JP2521616Y2/ja
Publication of JPH0431861U publication Critical patent/JPH0431861U/ja
Application granted granted Critical
Publication of JP2521616Y2 publication Critical patent/JP2521616Y2/ja
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
JP7229290U 1990-07-09 1990-07-09 システム電話装置の故障判定器 Expired - Lifetime JP2521616Y2 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7229290U JP2521616Y2 (ja) 1990-07-09 1990-07-09 システム電話装置の故障判定器

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7229290U JP2521616Y2 (ja) 1990-07-09 1990-07-09 システム電話装置の故障判定器

Publications (2)

Publication Number Publication Date
JPH0431861U JPH0431861U (enExample) 1992-03-16
JP2521616Y2 true JP2521616Y2 (ja) 1996-12-25

Family

ID=31610105

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7229290U Expired - Lifetime JP2521616Y2 (ja) 1990-07-09 1990-07-09 システム電話装置の故障判定器

Country Status (1)

Country Link
JP (1) JP2521616Y2 (enExample)

Also Published As

Publication number Publication date
JPH0431861U (enExample) 1992-03-16

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