JPS5847358A - 通話拡声機能付き電話機 - Google Patents

通話拡声機能付き電話機

Info

Publication number
JPS5847358A
JPS5847358A JP14575381A JP14575381A JPS5847358A JP S5847358 A JPS5847358 A JP S5847358A JP 14575381 A JP14575381 A JP 14575381A JP 14575381 A JP14575381 A JP 14575381A JP S5847358 A JPS5847358 A JP S5847358A
Authority
JP
Japan
Prior art keywords
relay
loudspeaker
power supply
telephone
call
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
JP14575381A
Other languages
English (en)
Japanese (ja)
Other versions
JPS6333828B2 (cg-RX-API-DMAC7.html
Inventor
Michiaki Iwanami
岩波　道昭
Masaaki Ugaki
宇垣　雅秋
Masato Araki
荒木　誠人
Setsuo Oshima
大島　節雄
Mamoru Sasaki
守 佐々木
Juichi Tanabe
田辺　重一
Shingo Tanaka
信吾 田中
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.)
HASEGAWA DENKI SEISAKUSHO KK
NAKAYO TSUSHINKI KK
Meisei Electric Co Ltd
NEC Platforms Ltd
Iwatsu Electric Co Ltd
Taiko Electric Works Ltd
Nakayo Telecommunications Inc
Iwasaki Tsushinki KK
NTT Inc
Original Assignee
HASEGAWA DENKI SEISAKUSHO KK
NAKAYO TSUSHINKI KK
Meisei Electric Co Ltd
Iwatsu Electric Co Ltd
Nippon Telegraph and Telephone Corp
Taiko Electric Works Ltd
Nakayo Telecommunications Inc
Iwasaki Tsushinki KK
Nitsuko 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 HASEGAWA DENKI SEISAKUSHO KK, NAKAYO TSUSHINKI KK, Meisei Electric Co Ltd, Iwatsu Electric Co Ltd, Nippon Telegraph and Telephone Corp, Taiko Electric Works Ltd, Nakayo Telecommunications Inc, Iwasaki Tsushinki KK, Nitsuko Corp filed Critical HASEGAWA DENKI SEISAKUSHO KK
Priority to JP14575381A priority Critical patent/JPS5847358A/ja
Publication of JPS5847358A publication Critical patent/JPS5847358A/ja
Publication of JPS6333828B2 publication Critical patent/JPS6333828B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
    • H04M1/6033—Substation equipment, e.g. for use by subscribers including speech amplifiers for providing handsfree use or a loudspeaker mode in telephone sets

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
JP14575381A 1981-09-16 1981-09-16 通話拡声機能付き電話機 Granted JPS5847358A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14575381A JPS5847358A (ja) 1981-09-16 1981-09-16 通話拡声機能付き電話機

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14575381A JPS5847358A (ja) 1981-09-16 1981-09-16 通話拡声機能付き電話機

Publications (2)

Publication Number Publication Date
JPS5847358A true JPS5847358A (ja) 1983-03-19
JPS6333828B2 JPS6333828B2 (cg-RX-API-DMAC7.html) 1988-07-07

Family

ID=15392354

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14575381A Granted JPS5847358A (ja) 1981-09-16 1981-09-16 通話拡声機能付き電話機

Country Status (1)

Country Link
JP (1) JPS5847358A (cg-RX-API-DMAC7.html)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60134654A (ja) * 1983-12-23 1985-07-17 Fujitsu Ltd スピ−カ受話回路付き電話機

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60134654A (ja) * 1983-12-23 1985-07-17 Fujitsu Ltd スピ−カ受話回路付き電話機

Also Published As

Publication number Publication date
JPS6333828B2 (cg-RX-API-DMAC7.html) 1988-07-07

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