JPS64857A - Emergency telephone - Google Patents

Emergency telephone

Info

Publication number
JPS64857A
JPS64857A JP15570887A JP15570887A JPS64857A JP S64857 A JPS64857 A JP S64857A JP 15570887 A JP15570887 A JP 15570887A JP 15570887 A JP15570887 A JP 15570887A JP S64857 A JPS64857 A JP S64857A
Authority
JP
Japan
Prior art keywords
telephone line
abnormality
relay
telephone
contact
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
JP15570887A
Other languages
English (en)
Other versions
JPH01857A (ja
Inventor
Kunio Yamada
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP15570887A priority Critical patent/JPS64857A/ja
Publication of JPH01857A publication Critical patent/JPH01857A/ja
Publication of JPS64857A publication Critical patent/JPS64857A/ja
Pending legal-status Critical Current

Links

Landscapes

  • Alarm Systems (AREA)
JP15570887A 1987-06-23 1987-06-23 Emergency telephone Pending JPS64857A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15570887A JPS64857A (en) 1987-06-23 1987-06-23 Emergency telephone

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15570887A JPS64857A (en) 1987-06-23 1987-06-23 Emergency telephone

Publications (2)

Publication Number Publication Date
JPH01857A JPH01857A (ja) 1989-01-05
JPS64857A true JPS64857A (en) 1989-01-05

Family

ID=15611772

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15570887A Pending JPS64857A (en) 1987-06-23 1987-06-23 Emergency telephone

Country Status (1)

Country Link
JP (1) JPS64857A (ja)

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