JPH071879Y2 - ボタン電話装置の応答検出回路 - Google Patents

ボタン電話装置の応答検出回路

Info

Publication number
JPH071879Y2
JPH071879Y2 JP6441788U JP6441788U JPH071879Y2 JP H071879 Y2 JPH071879 Y2 JP H071879Y2 JP 6441788 U JP6441788 U JP 6441788U JP 6441788 U JP6441788 U JP 6441788U JP H071879 Y2 JPH071879 Y2 JP H071879Y2
Authority
JP
Japan
Prior art keywords
telephone
control signal
signal
circuit
response
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
JP6441788U
Other languages
English (en)
Japanese (ja)
Other versions
JPH01167785U (en]
Inventor
裕光 小倉
雅行 富田
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.)
Nippon Telegraph and Telephone Corp
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 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 JPH01167785U (en]) 1989-11-27
JPH071879Y2 true 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 (en])

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2682213B2 (ja) * 1990-08-15 1997-11-26 沖電気工業株式会社 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
JPH01167785U (en]) 1989-11-27

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