JPH01167785U - - Google Patents

Info

Publication number
JPH01167785U
JPH01167785U JP6441788U JP6441788U JPH01167785U JP H01167785 U JPH01167785 U JP H01167785U JP 6441788 U JP6441788 U JP 6441788U JP 6441788 U JP6441788 U JP 6441788U JP H01167785 U JPH01167785 U JP H01167785U
Authority
JP
Japan
Prior art keywords
telephone
circuit
detects
low frequency
frequency pulse
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
JP6441788U
Other languages
English (en)
Japanese (ja)
Other versions
JPH071879Y2 (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 JP6441788U priority Critical patent/JPH071879Y2/ja
Publication of JPH01167785U publication Critical patent/JPH01167785U/ja
Application granted granted Critical
Publication of JPH071879Y2 publication Critical patent/JPH071879Y2/ja
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Devices For Supply Of Signal Current (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)
JP6441788U 1988-05-18 1988-05-18 ボタン電話装置の応答検出回路 Expired - Lifetime JPH071879Y2 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6441788U JPH071879Y2 (ja) 1988-05-18 1988-05-18 ボタン電話装置の応答検出回路

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6441788U JPH071879Y2 (ja) 1988-05-18 1988-05-18 ボタン電話装置の応答検出回路

Publications (2)

Publication Number Publication Date
JPH01167785U true JPH01167785U (enExample) 1989-11-27
JPH071879Y2 JPH071879Y2 (ja) 1995-01-18

Family

ID=31289884

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6441788U Expired - Lifetime JPH071879Y2 (ja) 1988-05-18 1988-05-18 ボタン電話装置の応答検出回路

Country Status (1)

Country Link
JP (1) JPH071879Y2 (enExample)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0497694A (ja) * 1990-08-15 1992-03-30 Oki Electric Ind Co Ltd ボタン電話装置の内線着信応答監視回路及びその監視方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0497694A (ja) * 1990-08-15 1992-03-30 Oki Electric Ind Co Ltd ボタン電話装置の内線着信応答監視回路及びその監視方法

Also Published As

Publication number Publication date
JPH071879Y2 (ja) 1995-01-18

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