JPH0434054U - - Google Patents
Info
- Publication number
- JPH0434054U JPH0434054U JP7475690U JP7475690U JPH0434054U JP H0434054 U JPH0434054 U JP H0434054U JP 7475690 U JP7475690 U JP 7475690U JP 7475690 U JP7475690 U JP 7475690U JP H0434054 U JPH0434054 U JP H0434054U
- Authority
- JP
- Japan
- Prior art keywords
- telephone line
- signal
- wire
- circuit
- connection switch
- 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.)
- Granted
Links
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 3
Description
第１図は本考案による電話回線の交流信号受信
回路を設けた遠隔制御装置と電話回線を共用する
留守番電話機のブロツク図、第２図は従来の電話
回線を共用する遠隔制御装置と留守番電話機のブ
ロツク図である。
２……着信検出器（呼出信号検出回路）、４…
…２線・４線変換用ハイブリツドコイル（２線・
４線変換用ハイブリツド回路）、８……ＰＢ信号
受信用継電器（交流信号接続用スイツチ）、９…
…整合線輪（直流ループ回路）、Ｌ１，Ｌ２……
電話回線。
Fig. 1 is a block diagram of an answering machine that shares a telephone line with a remote control device equipped with an AC signal receiving circuit for a telephone line according to the present invention, and Fig. 2 shows a block diagram of a conventional remote control device and an answering machine that share a telephone line. It is a block diagram. 2... Incoming call detector (ringing signal detection circuit), 4...
…Hybrid coil for 2-wire/4-wire conversion (2-wire/
4-wire conversion hybrid circuit), 8...PB signal reception relay (AC signal connection switch), 9...
...Matching wire ring (DC loop circuit), L 1 , L 2 ...
telephone line.
Claims (1)
出信号検出回路と、前記呼出信号が停止したとき
前記電話回線から入力される交流信号を２線・４
線変換用ハイブリツド回路へ接続する交流信号接
続用スイツチと、前記交流信号接続用スイツチの
動作で前記電話回線から前記２線・４線変換用ハ
イブリツド回路へ送出される前記交流信号の正常
性が確認されたとき前記電話回線に対し直流ルー
プを形成する直流ループ回路とを備えたことを特
徴とする電話回線の交流信号受信回路。 A ringing signal detection circuit detects a ringing signal input from a telephone line, and a 2-wire/4-wire AC signal is input from the telephone line when the ringing signal stops.
The normality of the AC signal sent from the telephone line to the 2-wire/4-wire conversion hybrid circuit is confirmed by the operation of the AC signal connection switch connected to the line conversion hybrid circuit and the AC signal connection switch. an alternating current signal receiving circuit for a telephone line, comprising a direct current loop circuit that forms a direct current loop with respect to the telephone line when the telephone line is turned on.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990074756U JP2528507Y2 (en) | 1990-07-13 | 1990-07-13 | AC signal receiving circuit of telephone line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990074756U JP2528507Y2 (en) | 1990-07-13 | 1990-07-13 | AC signal receiving circuit of telephone line |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0434054U true JPH0434054U (en) | 1992-03-19 |
| JP2528507Y2 JP2528507Y2 (en) | 1997-03-12 |
Family
ID=31614730
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1990074756U Expired - Lifetime JP2528507Y2 (en) | 1990-07-13 | 1990-07-13 | AC signal receiving circuit of telephone line |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2528507Y2 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63123259A (en) * | 1986-11-13 | 1988-05-27 | Mitsubishi Electric Corp | Remote control device |
| JPH01179555A (en) * | 1988-01-10 | 1989-07-17 | Nec Home Electron Ltd | Remote control device by public line and its using method |
-
1990
- 1990-07-13 JP JP1990074756U patent/JP2528507Y2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63123259A (en) * | 1986-11-13 | 1988-05-27 | Mitsubishi Electric Corp | Remote control device |
| JPH01179555A (en) * | 1988-01-10 | 1989-07-17 | Nec Home Electron Ltd | Remote control device by public line and its using method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2528507Y2 (en) | 1997-03-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |