JPS6210578U - - Google Patents
Info
- Publication number
- JPS6210578U JPS6210578U JP10048985U JP10048985U JPS6210578U JP S6210578 U JPS6210578 U JP S6210578U JP 10048985 U JP10048985 U JP 10048985U JP 10048985 U JP10048985 U JP 10048985U JP S6210578 U JPS6210578 U JP S6210578U
- Authority
- JP
- Japan
- Prior art keywords
- signal
- reverse
- terminal side
- transmitting
- forward 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
- 238000011144 upstream manufacturing Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
Description
第１図は本考案の双方向データ通信装置の実施
例を示すブロツク図、第２図は従来の双方向デー
タ通信装置を示すブロツク図である。
２１…中央局、２２…フオワード信号送信器、
２３…リバース信号受信器、２５…幹線、３１…
端末器、３２…フオワード信号受信器、３３…リ
バース信号送信器、３７…復調器、３９…可変利
得増幅器、４１…制御線。
FIG. 1 is a block diagram showing an embodiment of a two-way data communication device of the present invention, and FIG. 2 is a block diagram showing a conventional two-way data communication device. 21... Central station, 22... Forward signal transmitter,
23...Reverse signal receiver, 25... Main line, 31...
Terminal device, 32... Forward signal receiver, 33... Reverse signal transmitter, 37... Demodulator, 39... Variable gain amplifier, 41... Control line.
Claims (1)
向に送出するためのフオワード信号送信器と、 中央局側に設けられ、端末側からのリバース信
号を受信するためのリバース信号受信器と、 中央局側と端末側間に設けられ、前記フオワー
ド信号及びリバース信号を伝送するための回線手
段と、 端末側に設けられ、前記フオワード信号を受信
し、その信号レベルを検出する手段を備えたフオ
ワード信号受信器と、 端末側に設けられ、前記フオワード信号受信器
で検出したフオワード信号のレベルに応じてリバ
ース信号の出力レベルを可変させる手段を備え、
リバース信号を上り方向に送出するためのリバー
ス信号送信器とを具備したことを特徴とする双方
向データ通信装置。[Claims for Utility Model Registration] A forward signal transmitter provided on the central station side for transmitting forward signals in the downstream direction, and a reverse signal transmitter provided on the central station side for receiving reverse signals from the terminal side. a signal receiver; a line provided between the central office side and the terminal side for transmitting the forward signal and the reverse signal; and a line means provided on the terminal side for receiving the forward signal and detecting the signal level. a forward signal receiver comprising means; and means provided on the terminal side for varying the output level of the reverse signal according to the level of the forward signal detected by the forward signal receiver,
A two-way data communication device comprising: a reverse signal transmitter for transmitting a reverse signal in an upstream direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10048985U JPS6210578U (en) | 1985-07-03 | 1985-07-03 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10048985U JPS6210578U (en) | 1985-07-03 | 1985-07-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6210578U true JPS6210578U (en) | 1987-01-22 |
Family
ID=30970361
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10048985U Pending JPS6210578U (en) | 1985-07-03 | 1985-07-03 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6210578U (en) |
-
1985
- 1985-07-03 JP JP10048985U patent/JPS6210578U/ja active Pending
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