JPS6237476U - - Google Patents

Info

Publication number
JPS6237476U
JPS6237476U JP12815085U JP12815085U JPS6237476U JP S6237476 U JPS6237476 U JP S6237476U JP 12815085 U JP12815085 U JP 12815085U JP 12815085 U JP12815085 U JP 12815085U JP S6237476 U JPS6237476 U JP S6237476U
Authority
JP
Japan
Prior art keywords
communication line
circuit
earth
light emitting
element inserted
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.)
Granted
Application number
JP12815085U
Other languages
English (en)
Other versions
JPH0413880Y2 (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 JP1985128150U priority Critical patent/JPH0413880Y2/ja
Publication of JPS6237476U publication Critical patent/JPS6237476U/ja
Application granted granted Critical
Publication of JPH0413880Y2 publication Critical patent/JPH0413880Y2/ja
Expired legal-status Critical Current

Links

Landscapes

  • Interface Circuits In Exchanges (AREA)
  • Monitoring And Testing Of Exchanges (AREA)

Description

【図面の簡単な説明】
第１図は本考案の一実施例を示す端末機器識別
用アース監視制御装置と共同電話機の構成図、第
２図は従来の共同電話機の回路構成図である。 １：保安器接地抵抗、２：ダイヤルインパルス
接点、３：ベルコイル、４：フツクスイツチ、５
：送話器、６：受話器、７：ホトサイリスタ、８
：発光ダイオード、９：着信信号整流用ダイオー
ド、１０：極性転換整流用ダイオード。

Claims (1)

    【実用新案登録請求の範囲】
  1. １つの通信回線に接続された複数の端末装置を
    、地気の有無により個別に識別するシステムにお
    いて、地気を検出するため端末装置側の地気回路
    に直列に挿入された発光素子と、上記端末装置を
    接続する通信線の回路途中に挿入され、上記発光
    ダイオードからの光信号により制御されて通信回
    線の回路を開閉する受光素子とを備えたことを特
    徴とする端末識別用アース監視制御装置。
JP1985128150U 1985-08-22 1985-08-22 Expired JPH0413880Y2 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1985128150U JPH0413880Y2 (ja) 1985-08-22 1985-08-22

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1985128150U JPH0413880Y2 (ja) 1985-08-22 1985-08-22

Publications (2)

Publication Number Publication Date
JPS6237476U true JPS6237476U (ja) 1987-03-05
JPH0413880Y2 JPH0413880Y2 (ja) 1992-03-30

Family

ID=31023559

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1985128150U Expired JPH0413880Y2 (ja) 1985-08-22 1985-08-22

Country Status (1)

Country Link
JP (1) JPH0413880Y2 (ja)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS559199U (ja) * 1978-08-12 1980-01-21
JPS58105684A (ja) * 1981-12-17 1983-06-23 Nec Corp 共同電話識別回路

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS559199U (ja) * 1978-08-12 1980-01-21
JPS58105684A (ja) * 1981-12-17 1983-06-23 Nec Corp 共同電話識別回路

Also Published As

Publication number Publication date
JPH0413880Y2 (ja) 1992-03-30

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