JPS61128858U - - Google Patents

Info

Publication number
JPS61128858U
JPS61128858U JP1127185U JP1127185U JPS61128858U JP S61128858 U JPS61128858 U JP S61128858U JP 1127185 U JP1127185 U JP 1127185U JP 1127185 U JP1127185 U JP 1127185U JP S61128858 U JPS61128858 U JP S61128858U
Authority
JP
Japan
Prior art keywords
period
hook
back tone
during
ring back
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.)
Pending
Application number
JP1127185U
Other languages
Japanese (ja)
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 filed Critical
Priority to JP1127185U priority Critical patent/JPS61128858U/ja
Publication of JPS61128858U publication Critical patent/JPS61128858U/ja
Pending legal-status Critical Current

Links

Landscapes

  • Telephone Set Structure (AREA)

Description

【図面の簡単な説明】[Brief explanation of drawings]

第１図は本考案の一実施例の構成を示すブロツ
ク図、第２図は本考案の一実施例における制御回
路の一例を示す回路図、第３図は本考案の一実施
例の作用の説明に供する波形図である。 １……復調器、２……オーデイオ増幅器、３…
…スピーカ、４……リング・バツク・トーン（Ｒ
ＢＴ）検出回路、５……制御回路、６……マイク
ロホン、７……マイク増幅器、８……変調器、９
……送信回路、１０……サイリスタ、１１……オ
フフツクスイツチ、１２，１３および１４……ト
ランジスタ。 Fig. 1 is a block diagram showing the configuration of an embodiment of the present invention, Fig. 2 is a circuit diagram showing an example of a control circuit in an embodiment of the invention, and Fig. 3 shows the operation of an embodiment of the invention. It is a waveform diagram provided for explanation. 1...Demodulator, 2...Audio amplifier, 3...
...Speaker, 4...Ring back tone (R
BT) detection circuit, 5... control circuit, 6... microphone, 7... microphone amplifier, 8... modulator, 9
...Transmission circuit, 10...Thyristor, 11...Off switch, 12, 13 and 14...Transistor.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 電話回線接続通信機において、オフフツク中に
リング・バツク・トーン信号を検出したときから
オンフツクするまでの期間以外においてマイクロ
ホン出力をミユートするようにしてなることを特
徴とする電話回線接続通信機。 A telephone line-connected communication device, characterized in that the microphone output is muted during a period other than the period from when a ring back tone signal is detected during off-hook until on-hook.
JP1127185U 1985-01-31 1985-01-31 Pending JPS61128858U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1127185U JPS61128858U (en) 1985-01-31 1985-01-31

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1127185U JPS61128858U (en) 1985-01-31 1985-01-31

Publications (1)

Publication Number Publication Date
JPS61128858U true JPS61128858U (en) 1986-08-12

Family

ID=30493238

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1127185U Pending JPS61128858U (en) 1985-01-31 1985-01-31

Country Status (1)

Country Link
JP (1) JPS61128858U (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62159952A (en) * 1986-01-09 1987-07-15 Matsushita Electric Ind Co Ltd Telephone terminal equipment
JPS643354U (en) * 1987-06-25 1989-01-10
JPH0221847U (en) * 1988-07-15 1990-02-14

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5787656A (en) * 1980-11-21 1982-06-01 Nippon Telegr & Teleph Corp <Ntt> Loudspeaker transmitting system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5787656A (en) * 1980-11-21 1982-06-01 Nippon Telegr & Teleph Corp <Ntt> Loudspeaker transmitting system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62159952A (en) * 1986-01-09 1987-07-15 Matsushita Electric Ind Co Ltd Telephone terminal equipment
JPS643354U (en) * 1987-06-25 1989-01-10
JPH0221847U (en) * 1988-07-15 1990-02-14

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