JPH02100362U - - Google Patents
Info
- Publication number
- JPH02100362U JPH02100362U JP777289U JP777289U JPH02100362U JP H02100362 U JPH02100362 U JP H02100362U JP 777289 U JP777289 U JP 777289U JP 777289 U JP777289 U JP 777289U JP H02100362 U JPH02100362 U JP H02100362U
- Authority
- JP
- Japan
- Prior art keywords
- hold
- call
- resistor
- output circuit
- music
- 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
Links
- 239000003990 capacitor Substances 0.000 claims description 2
- 230000010355 oscillation Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
Description
第１図は本考案に係る電話機の保留音出力回路
の電気的接続を示す回路図、第２図は従来の保留
音出力回路を備えた電話機の一般的な構成を示す
概略ブロツク線図である。
１…リングオシレータ、Ｒ０…外付抵抗、Ｒ１
，Ｒ２…音楽速度変更用抵抗、Ｒ３，Ｒ４…時定
数用抵抗、Ｃ３，Ｃ４…時定数用コンデンサ、Ｑ
１，Ｑ２…スイツチングトランジスタ。
FIG. 1 is a circuit diagram showing the electrical connection of a music-on-hold output circuit of a telephone according to the present invention, and FIG. 2 is a schematic block diagram showing the general configuration of a telephone equipped with a conventional music-on-hold output circuit. . 1... Ring oscillator, R 0 ... External resistor, R 1
, R 2 ... Resistor for changing music speed, R 3 , R 4 ... Resistor for time constant, C 3 , C 4 ... Capacitor for time constant, Q
1 , Q2 ...Switching transistor.
Claims (1)
に、その通話相手及び送話者自身に対して保留中
であることを知らせる保留音を送出する電話機の
保留音出力回路において、 ベースが時定数用抵抗を介して通話保留時に供
給されるプラス電源に接続されるとともに時定数
用コンデンサを介して接地されたスイツチングト
ランジスタのコレクタに、音楽速度変更用抵抗の
一端が接続され、このようにスイツチングトラン
ジスタと音楽速度変更用抵抗とが組み合わされた
回路が、前記保留音出力回路を構成する発振回路
の外付抵抗に対して１乃至複数個並列に接続され
たことを特徴とする保留音出力回路。[Scope of Utility Model Registration Claim] A hold tone output circuit for a telephone that, when a telephone line is placed on hold during a call, sends out a hold tone to notify the other party and the person making the call that the call is on hold. In this case, one end of the music speed changing resistor is connected to the collector of a switching transistor whose base is connected via a time constant resistor to the positive power supply supplied during call hold and is grounded via a time constant capacitor. and that one or more circuits in which a switching transistor and a music speed changing resistor are combined are connected in parallel to an external resistor of an oscillation circuit constituting the held music output circuit. Features a hold music output circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP777289U JPH02100362U (en) | 1989-01-25 | 1989-01-25 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP777289U JPH02100362U (en) | 1989-01-25 | 1989-01-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02100362U true JPH02100362U (en) | 1990-08-09 |
Family
ID=31213071
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP777289U Pending JPH02100362U (en) | 1989-01-25 | 1989-01-25 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02100362U (en) |
-
1989
- 1989-01-25 JP JP777289U patent/JPH02100362U/ja active Pending
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