JPH0131745B2 - - Google Patents

Info

Publication number
JPH0131745B2
JPH0131745B2 JP57006801A JP680182A JPH0131745B2 JP H0131745 B2 JPH0131745 B2 JP H0131745B2 JP 57006801 A JP57006801 A JP 57006801A JP 680182 A JP680182 A JP 680182A JP H0131745 B2 JPH0131745 B2 JP H0131745B2
Authority
JP
Japan
Prior art keywords
switch
loudspeaker
state
handset
hook
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
JP57006801A
Other languages
English (en)
Japanese (ja)
Other versions
JPS58124358A (ja
Inventor
Naoki Matsuo
Koichi Matsumoto
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 JP680182A priority Critical patent/JPS58124358A/ja
Publication of JPS58124358A publication Critical patent/JPS58124358A/ja
Publication of JPH0131745B2 publication Critical patent/JPH0131745B2/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)
JP680182A 1982-01-21 1982-01-21 拡声受話状態切替方式 Granted JPS58124358A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP680182A JPS58124358A (ja) 1982-01-21 1982-01-21 拡声受話状態切替方式

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP680182A JPS58124358A (ja) 1982-01-21 1982-01-21 拡声受話状態切替方式

Publications (2)

Publication Number Publication Date
JPS58124358A JPS58124358A (ja) 1983-07-23
JPH0131745B2 true JPH0131745B2 (en]) 1989-06-27

Family

ID=11648283

Family Applications (1)

Application Number Title Priority Date Filing Date
JP680182A Granted JPS58124358A (ja) 1982-01-21 1982-01-21 拡声受話状態切替方式

Country Status (1)

Country Link
JP (1) JPS58124358A (en])

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6077557A (ja) * 1983-10-05 1985-05-02 Taiko Denki Seisakusho:Kk オンフツクダイヤル機能を有する電話機回路
JPS60172865A (ja) * 1984-02-17 1985-09-06 Meisei Electric Co Ltd 電話機回路方式
JPS60227551A (ja) * 1984-04-26 1985-11-12 Tamura Electric Works Ltd 電話端末装置
JPS60184357U (ja) * 1984-05-16 1985-12-06 八重洲無線株式会社 高声呼出スピ−カ回路
JPS60184363U (ja) * 1984-05-18 1985-12-06 株式会社田村電機製作所 機能電話機
JPS61284149A (ja) * 1985-06-10 1986-12-15 Panafacom Ltd 電話機のスピ−カ受話制御方式
JPH0789635B2 (ja) * 1986-04-15 1995-09-27 キヤノン株式会社 電話機
JPH01149651A (ja) * 1987-12-07 1989-06-12 Fujitsu Denso Ltd ハンズフリー電話端末装置

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3881069A (en) * 1973-04-05 1975-04-29 Nitsuko Ltd Telephone call loudspeaker monitoring and relay control circuit
JPS56112166A (en) * 1980-02-12 1981-09-04 Toshiba Corp Receiving voice amplifying system for telephone set

Also Published As

Publication number Publication date
JPS58124358A (ja) 1983-07-23

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