JPH0423356U - - Google Patents
Info
- Publication number
- JPH0423356U JPH0423356U JP6517990U JP6517990U JPH0423356U JP H0423356 U JPH0423356 U JP H0423356U JP 6517990 U JP6517990 U JP 6517990U JP 6517990 U JP6517990 U JP 6517990U JP H0423356 U JPH0423356 U JP H0423356U
- Authority
- JP
- Japan
- Prior art keywords
- signal
- dtmf
- irregular
- restoration
- dtmf signal
- 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
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 230000001788 irregular Effects 0.000 claims 7
- 238000010586 diagram Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 1
Description
第１図は本考案の一実施例であるＤＴＭＦ信号
の変換装置及び復元装置を利用した一方向通信シ
ステムの電気回路ブロツク図、第２図はそのＤＴ
ＭＦ信号の変換装置及び復元装置を複数利用した
双方向通信システムの電気回路ブロツク図を示し
ている。
１０……変換装置、２０……復元装置、１０ａ
，２０ａ……極性反転検出回路、１０ｂ，２０ｂ
……切替リレー、１０ｃ……信号変換回路、２０
ｃ……信号復元回路、１０ｄ，２０ｄ……周波数
設定回路、１０ｅ，２０ｅ……操作部、３０……
ＤＴＭＦ信号送信機、４０……公衆電話回線、５
０……ＤＴＭＦ信号受信機、６０……ＤＴＭＦ信
号送受信装置。
Figure 1 is an electrical circuit block diagram of a one-way communication system using a DTMF signal converter and restorer, which is an embodiment of the present invention, and Figure 2 is an electrical circuit block diagram of the DTMF signal converter and restorer.
1 shows an electric circuit block diagram of a two-way communication system using a plurality of MF signal conversion devices and restoration devices. 10... Conversion device, 20... Restoration device, 10a
, 20a...Polarity reversal detection circuit, 10b, 20b
...Switching relay, 10c...Signal conversion circuit, 20
c...Signal restoration circuit, 10d, 20d...Frequency setting circuit, 10e, 20e...Operation unit, 30...
DTMF signal transmitter, 40...Public telephone line, 5
0...DTMF signal receiver, 60...DTMF signal transmitting/receiving device.
Claims (1)
ら出力されるＤＴＭＦ信号を入力するＤＴＭＦ信
号入力部と、 該ＤＴＭＦ信号入力部より入力されたＤＴＭＦ
信号を、周波数の異なる変則信号に変更して電話
回線へ出力する信号変更出力部と、 該信号変換出力部がＤＴＭＦ信号を変則信号に
変更する際の変更量を外部からの指令に応じて設
定する変更量設定手段と、 を備えたことを特徴とするＤＴＭＦ信号の変換装
置。 ２ 周波数の異なる変則信号に変換されたＤＴＭ
Ｆ信号を電話回線から入力する変則信号入力部と
、 該変則信号入力部より入力された前記変則信号
をＤＴＭＦ信号に復元してＤＴＭＦ信号によるデ
ータ通信を行う機器に出力する信号復元出力部と
、 該信号復元出力部が変則信号をＤＴＭＦ信号に
復元する際の復元量を外部からの指令に応じて設
定する復元量設定手段と、 を備えたことを特徴とするＤＴＭＦ信号の復元装
置。[Claims for Utility Model Registration] 1. A DTMF signal input unit that inputs a DTMF signal output from a device that performs data communication using DTMF signals, and a DTMF signal input from the DTMF signal input unit.
A signal change output unit that changes a signal into an irregular signal with a different frequency and outputs it to a telephone line; and a signal conversion output unit that sets the amount of change when changing the DTMF signal to the irregular signal in response to an external command. A DTMF signal conversion device comprising: a change amount setting means for setting a change amount; 2 DTM converted into irregular signals with different frequencies
an irregular signal input section that inputs the F signal from the telephone line; a signal restoration output section that restores the irregular signal input from the irregular signal input section to a DTMF signal and outputs it to a device that performs data communication using the DTMF signal; A restoration device for a DTMF signal, comprising: restoration amount setting means for setting the restoration amount when the signal restoration output unit restores the irregular signal into the DTMF signal in accordance with an external command.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6517990U JPH0423356U (en) | 1990-06-20 | 1990-06-20 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6517990U JPH0423356U (en) | 1990-06-20 | 1990-06-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0423356U true JPH0423356U (en) | 1992-02-26 |
Family
ID=31596780
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6517990U Pending JPH0423356U (en) | 1990-06-20 | 1990-06-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0423356U (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5241782A (en) * | 1975-09-29 | 1977-03-31 | Rajio Kanto:Kk | Device control apparatus in broadcasting installation |
| JPS57111150A (en) * | 1980-12-26 | 1982-07-10 | Fujitsu Ltd | Radio communication system |
-
1990
- 1990-06-20 JP JP6517990U patent/JPH0423356U/ja active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5241782A (en) * | 1975-09-29 | 1977-03-31 | Rajio Kanto:Kk | Device control apparatus in broadcasting installation |
| JPS57111150A (en) * | 1980-12-26 | 1982-07-10 | Fujitsu Ltd | Radio communication system |
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