JPS6280454U

JPS6280454U -

Info

Publication number: JPS6280454U
Application number: JP17190485U
Authority: JP
Priority date: 1985-11-08
Filing date: 1985-11-08
Publication date: 1987-05-22

Description

[Brief explanation of the drawing]

第１図は本考案に係るヘツドセツトアダプター
Ａの概略ブロツク図、第２図は着信前の詳細な回
路図、第３図は着信状態の概略回路図、第４図は
保留状態の概略回路図である。図中主要符号、１……局線、２……電話機、３
，４，５，６……リード線、７……電話機回路網
、８……保留音送出回路、１８，１９……リード
線、２３……クリツクアブソーバー、２４……側
音防止回路、Ａ……ヘツドセツトアダプター、Ｌ
Ｋａ，ＬＫｂ……応答キー、ＨＫａ，ＨＫｂ……
保留キー、ＬＮ……ネツトワークトランス。 Fig. 1 is a schematic block diagram of the headset adapter A according to the present invention, Fig. 2 is a detailed circuit diagram before receiving a call, Fig. 3 is a schematic circuit diagram in a receiving state, and Fig. 4 is a schematic circuit diagram in a holding state. It is. Main symbols in the diagram: 1... Office line, 2... Telephone, 3
, 4, 5, 6...Lead wire, 7...Telephone circuit network, 8...Hold tone sending circuit, 18, 19...Lead wire, 23...Click absorber, 24...Side sound prevention circuit, A... …Head set adapter, L
Ka, LKb...Response key, HKa, HKb...
Hold key, LN...Network transformer.

Claims

[Scope of utility model registration request]

Lead wires 3, 4 connecting the two central office lines 1, 1 and telephone 2, and lead wire 5 of head set adapter A
, 6 are connected via response keys LKa and LKb, and the telephone circuit network 7 is connected in series to the lead wires 5 and 6.
The hold tone sending circuit 8 is connected to the lead wires 18 and 19, and the varistors V ₁ , V ₂ ,
A click absorber 23 consisting of V ₃ , etc., a network transformer LN and resistors R ₂ , R ₃ , R ₄ ,
A sidetone prevention circuit 24 consisting of _R6 , _R7, etc., a capacitor _C2 for cutting DC to the receiver R is incorporated, and hold keys HKa and HKb are connected to the connection inlet of the hold tone sending circuit 8. , a head set adapter for telephone answering, characterized in that a melody generation IC IC is incorporated in the hold tone sending circuit 8.