JPH0441656Y2 - - Google Patents

Info

Publication number
JPH0441656Y2
JPH0441656Y2 JP13404886U JP13404886U JPH0441656Y2 JP H0441656 Y2 JPH0441656 Y2 JP H0441656Y2 JP 13404886 U JP13404886 U JP 13404886U JP 13404886 U JP13404886 U JP 13404886U JP H0441656 Y2 JPH0441656 Y2 JP H0441656Y2
Authority
JP
Japan
Prior art keywords
terminal
circuit
light
changeover switch
display
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
Application number
JP13404886U
Other languages
English (en)
Japanese (ja)
Other versions
JPS6340053U (enrdf_load_stackoverflow
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 JP13404886U priority Critical patent/JPH0441656Y2/ja
Publication of JPS6340053U publication Critical patent/JPS6340053U/ja
Application granted granted Critical
Publication of JPH0441656Y2 publication Critical patent/JPH0441656Y2/ja
Expired legal-status Critical Current

Links

JP13404886U 1986-09-01 1986-09-01 Expired JPH0441656Y2 (enrdf_load_stackoverflow)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13404886U JPH0441656Y2 (enrdf_load_stackoverflow) 1986-09-01 1986-09-01

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13404886U JPH0441656Y2 (enrdf_load_stackoverflow) 1986-09-01 1986-09-01

Publications (2)

Publication Number Publication Date
JPS6340053U JPS6340053U (enrdf_load_stackoverflow) 1988-03-15
JPH0441656Y2 true JPH0441656Y2 (enrdf_load_stackoverflow) 1992-09-30

Family

ID=31034922

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13404886U Expired JPH0441656Y2 (enrdf_load_stackoverflow) 1986-09-01 1986-09-01

Country Status (1)

Country Link
JP (1) JPH0441656Y2 (enrdf_load_stackoverflow)

Also Published As

Publication number Publication date
JPS6340053U (enrdf_load_stackoverflow) 1988-03-15

Similar Documents

Publication Publication Date Title
US4969179A (en) Telephone line monitoring circuit for providing a visual and auditory signal if the telephone line becomes inoperative
JPH0441656Y2 (enrdf_load_stackoverflow)
CA1236231A (en) Telephone handset detector
CN103532239B (zh) 一种电力运行设备在线远传显示及报警装置
US4351987A (en) Telephone line circuit hold arrangement
CN110097743A (zh) 一种基于NB-Iot的老人定位求救方法及求救系统
US4701699A (en) Telephone station testing apparatus
CN216083916U (zh) 智慧网络社区报警装置
CN220965169U (zh) 通信设备和空调系统
JPH01208094A (ja) 局線インタフェースの直流ループ形成回路
US3553373A (en) Manual rerouter system for telephone subscriber station with combined conference call feature
JPH02164169A (ja) 電話回線におけるジャンパー線の極性チェッカー
JPH0564993U (ja) 火災発信機
CN110371818B (zh) 一种电梯故障联动警示装置
JPH082340Y2 (ja) 電気錠解錠制御回路
JPS5968096A (ja) 加入回線の断線監視装置
JPS5824732Y2 (ja) 検査品の識別装置
JPH047876B2 (enrdf_load_stackoverflow)
US3065301A (en) Communication switching arrangement
JPS5825720Y2 (ja) ケ−ブルガス圧警報監視装置
JP2505316B2 (ja) 故障回線の探索用具
CN2204474Y (zh) 自动寻呼防破坏电话报警装置
JPS6024756A (ja) 電話回線切断検出回路
JPS5846754A (ja) 秘話回路
JPH0230949Y2 (enrdf_load_stackoverflow)