JPS5981153U - 停電時におけるボタン電話装置の通話品質保証回路 - Google Patents

停電時におけるボタン電話装置の通話品質保証回路

Info

Publication number
JPS5981153U
JPS5981153U JP17493782U JP17493782U JPS5981153U JP S5981153 U JPS5981153 U JP S5981153U JP 17493782 U JP17493782 U JP 17493782U JP 17493782 U JP17493782 U JP 17493782U JP S5981153 U JPS5981153 U JP S5981153U
Authority
JP
Japan
Prior art keywords
power outage
telephone
quality assurance
balanced circuit
call quality
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
JP17493782U
Other languages
English (en)
Japanese (ja)
Other versions
JPH0230949Y2 (enrdf_load_stackoverflow
Inventor
大島　節雄
望月　啓介
田中　勤二
雅明 斉藤
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 JP17493782U priority Critical patent/JPS5981153U/ja
Publication of JPS5981153U publication Critical patent/JPS5981153U/ja
Application granted granted Critical
Publication of JPH0230949Y2 publication Critical patent/JPH0230949Y2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Sub-Exchange Stations And Push- Button Telephones (AREA)
JP17493782U 1982-11-20 1982-11-20 停電時におけるボタン電話装置の通話品質保証回路 Granted JPS5981153U (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17493782U JPS5981153U (ja) 1982-11-20 1982-11-20 停電時におけるボタン電話装置の通話品質保証回路

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17493782U JPS5981153U (ja) 1982-11-20 1982-11-20 停電時におけるボタン電話装置の通話品質保証回路

Publications (2)

Publication Number Publication Date
JPS5981153U true JPS5981153U (ja) 1984-06-01
JPH0230949Y2 JPH0230949Y2 (enrdf_load_stackoverflow) 1990-08-21

Family

ID=30380719

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17493782U Granted JPS5981153U (ja) 1982-11-20 1982-11-20 停電時におけるボタン電話装置の通話品質保証回路

Country Status (1)

Country Link
JP (1) JPS5981153U (enrdf_load_stackoverflow)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5623945U (enrdf_load_stackoverflow) * 1979-07-31 1981-03-04
JPS5686563A (en) * 1979-12-17 1981-07-14 Nec Corp Button telephone set

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5623945U (enrdf_load_stackoverflow) * 1979-07-31 1981-03-04
JPS5686563A (en) * 1979-12-17 1981-07-14 Nec Corp Button telephone set

Also Published As

Publication number Publication date
JPH0230949Y2 (enrdf_load_stackoverflow) 1990-08-21

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