JPS62158960U - - Google Patents
Info
- Publication number
- JPS62158960U JPS62158960U JP4676686U JP4676686U JPS62158960U JP S62158960 U JPS62158960 U JP S62158960U JP 4676686 U JP4676686 U JP 4676686U JP 4676686 U JP4676686 U JP 4676686U JP S62158960 U JPS62158960 U JP S62158960U
- Authority
- JP
- Japan
- Prior art keywords
- filter circuit
- pass filter
- signal
- dtmf signal
- response message
- 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
- 238000010586 diagram Methods 0.000 description 6
Description
第１図はこの考案に係る電話自動応対装置にお
けるＤＴＭＦ信号識別用のフイルタ回路の一実施
例を示すブロツク構成図、第２図は同実施例の動
作を説明するための特性図、第３図は同実施例の
要部の具体例を示す回路構成図、第４図及び第５
図はそれぞれ従来の電話自動応対装置におけるＤ
ＴＭＦ信号識別用のフイルタ回路を示す回路構成
図及びその特性図である。
１１…入力端子、１２…出力端子、１３…入力
端子、１４…フイルタ回路、１５…打ち消し回路
、１６…接続端子、１７…マイクロプロセツサー
、１８…ハイパスフイルタ回路、１９…ローパス
フイルタ回路、２０…入力端子、２１…出力端子
、２２…電源端子。
Fig. 1 is a block configuration diagram showing an embodiment of a filter circuit for DTMF signal identification in an automatic telephone answering device according to this invention, Fig. 2 is a characteristic diagram for explaining the operation of the embodiment, and Fig. 3 4 and 5 are circuit configuration diagrams showing specific examples of the main parts of the same embodiment.
The diagrams each show D in a conventional automatic telephone answering device.
2 is a circuit configuration diagram showing a filter circuit for TMF signal identification and its characteristic diagram. FIG. 11... Input terminal, 12... Output terminal, 13... Input terminal, 14... Filter circuit, 15... Cancellation circuit, 16... Connection terminal, 17... Microprocessor, 18... High pass filter circuit, 19... Low pass filter circuit, 20 ...input terminal, 21...output terminal, 22...power terminal.
Claims (1)
メツセージを電話回線に送出するとともに、前記
発信者から前記電話回線に送出されたＤＴＭＦ信
号を識別して所定の制御を行なわせる電話自動応
対装置に設けられるもの、前記応答メツセージを
前記電話回線に送出する際に、該応答メツセージ
信号から前記ＤＴＭＦ信号に使用される周波数成
分を除去するＤＴＭＦ信号識別用のフイルタ回路
において、前記フイルタ回路を、ハイパスフイル
タ回路及びローパスフイルタ回路が直列接続され
該ローパスフイルタ回路の出力が前記ハイパスフ
イルタ回路に帰還される構成とし、前記 ＤＴＭＦ信号に使用される周波数成分の前後の
周波数帯域で周波数特性が高くなるようにしたこ
とを特徴とする電話自動応対装置におけるＤＴＭ
Ｆ信号識別用のフイルタ回路。[Claims for Utility Model Registration] Detecting the arrival of a calling signal and sending a response message to the caller to the telephone line, and identifying the DTMF signal sent from the caller to the telephone line to perform predetermined control. A filter circuit for identifying a DTMF signal, which is provided in an automatic telephone answering device for removing a frequency component used for the DTMF signal from the response message signal when the response message is sent to the telephone line, The filter circuit has a configuration in which a high-pass filter circuit and a low-pass filter circuit are connected in series, and the output of the low-pass filter circuit is fed back to the high-pass filter circuit, and a frequency is set in a frequency band before and after the frequency component used for the DTMF signal. DTM in an automatic telephone answering device characterized by having high characteristics
Filter circuit for F signal identification.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4676686U JPS62158960U (en) | 1986-03-29 | 1986-03-29 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4676686U JPS62158960U (en) | 1986-03-29 | 1986-03-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62158960U true JPS62158960U (en) | 1987-10-08 |
Family
ID=30866733
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4676686U Pending JPS62158960U (en) | 1986-03-29 | 1986-03-29 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62158960U (en) |
-
1986
- 1986-03-29 JP JP4676686U patent/JPS62158960U/ja active Pending
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