JPS6333828B2 - - Google Patents

Info

Publication number
JPS6333828B2
JPS6333828B2 JP14575381A JP14575381A JPS6333828B2 JP S6333828 B2 JPS6333828 B2 JP S6333828B2 JP 14575381 A JP14575381 A JP 14575381A JP 14575381 A JP14575381 A JP 14575381A JP S6333828 B2 JPS6333828 B2 JP S6333828B2
Authority
JP
Japan
Prior art keywords
relay
loudspeaker
telephone
call
capacitor
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
Application number
JP14575381A
Other languages
English (en)
Japanese (ja)
Other versions
JPS5847358A (ja
Inventor
Michiaki Iwanami
Masaaki Ugaki
Masato Araki
Setsuo Ooshima
Mamoru Sasaki
Juichi Tanabe
Shingo Tanaka
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
Taiko Electric Works Ltd
Iwasaki Tsushinki KK
Original Assignee
Nippon Telegraph and Telephone Corp
Taiko Electric Works Ltd
Iwasaki Tsushinki KK
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, Taiko Electric Works Ltd, Iwasaki Tsushinki KK filed Critical Nippon Telegraph and Telephone Corp
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 JPS5847358A (ja) 1983-03-19
JPS6333828B2 true JPS6333828B2 (enrdf_load_stackoverflow) 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 (enrdf_load_stackoverflow)

Families Citing this family (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
JPS5847358A (ja) 1983-03-19

Similar Documents

Publication Publication Date Title
US4754476A (en) Premises page/intercom system utilizing telephone set component
GB2125657A (en) Loudspeaker telephone system
JP2956853B2 (ja) 電話音声回路網
JPS6333828B2 (enrdf_load_stackoverflow)
US5193107A (en) Speakerphone test set
JP3343315B2 (ja) インターホン装置
JPH03204295A (ja) 極性反転回路
US3920910A (en) Automatic telephone answering apparatus
JPH046295Y2 (enrdf_load_stackoverflow)
JPS596026Y2 (ja) 拡声電話機のクリツク防止回路
JPH0238530Y2 (enrdf_load_stackoverflow)
CN1023178C (zh) 一种电话自动找人装置
JPH0238529Y2 (enrdf_load_stackoverflow)
JPS60105352A (ja) 電話機回路
JPS60232750A (ja) 機能電話機のダイヤル送出音抑圧回路
JPS60227551A (ja) 電話端末装置
JPS6372249A (ja) 送受話切換回路
JPS59119954A (ja) 電話回路切替装置
JPH0316818B2 (enrdf_load_stackoverflow)
JPS6058765A (ja) 電話装置
JPH08102973A (ja) ナースコール電話装置
JPH0281554A (ja) 拡声放送機能付電話装置
JPH039669B2 (enrdf_load_stackoverflow)
JPS60174567A (ja) 電話機
JPH10336344A (ja) 有線放送電話用スピーカ制御システム