JPS609366U - Telephone extension interface circuit device - Google Patents
Telephone extension interface circuit deviceInfo
- Publication number
- JPS609366U JPS609366U JP10048283U JP10048283U JPS609366U JP S609366 U JPS609366 U JP S609366U JP 10048283 U JP10048283 U JP 10048283U JP 10048283 U JP10048283 U JP 10048283U JP S609366 U JPS609366 U JP S609366U
- Authority
- JP
- Japan
- Prior art keywords
- line
- switching
- interface circuit
- circuit
- 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
Landscapes
- Devices For Supply Of Signal Current (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は従来の電話内線インターフェース回路装置にお
ける回線インターフェース回路の回路図、第２図はこの
考案による回線インターフェース回路の実施例の回路図
、第３図はそのリンガ信号発生時の機能説明図、第４図
ａ ”−’ ｃは第３図における各部の波形図、第５図
は直流給電時の機能説明図である。
３・・・・・・電話機、７・・・・・・スイッチング回
路、８゜９・・・・・・モニタ回路、１０・・・・・・
ル制御回路、１１・・・・・・リンガ信号発生器、１２
・・・・・・高周波信号発生器、１３．１６・・・・・
・コンパレータ、１４・・・・・・インバータ。FIG. 1 is a circuit diagram of a line interface circuit in a conventional telephone internal line interface circuit device, FIG. 2 is a circuit diagram of an embodiment of the line interface circuit according to this invention, and FIG. 3 is a functional explanatory diagram when generating a ringer signal. Figures 4a and 4c are waveform diagrams of each part in Figure 3, and Figure 5 is a functional explanatory diagram during DC power supply. 3...Telephone, 7...Switching circuit , 8゜9...Monitor circuit, 10...
control circuit, 11... ringer signal generator, 12
...High frequency signal generator, 13.16...
・Comparator, 14...Inverter.
Claims (1)
路と、リンガ信号発生器を有し、リンが信号発生時には
該リンガ信号発生器から発生されるリンが信号で高周波
信号をパルス幅変調した変調信号により前記スイッチン
グ回路を名イツチングして回線に対してリンガ信号を送
出し、直流給電時には前記回線の両端間の電圧および前
記回線を流れる電流を検出しその検出出力にもとづき前
記高周波信号をパルス幅変調した変調信号により前記ス
イッチング回路をスイッチングして前記回線に対する直
流給電を行う制御回路とを各回線インタフェース回路毎
にそれぞれ具備していることを特徴とする電話内線イン
タフェース回路装置。It has a switching circuit made up of a plurality of conductive switching elements and a ringer signal generator, and when a ringer signal is generated, the ringer signal generator generates a ringer signal and performs the switching using a modulation signal that is a pulse width modulated high frequency signal. A ringer signal is sent to the line by switching the circuit, and when DC power is supplied, the voltage between both ends of the line and the current flowing through the line are detected, and the high-frequency signal is pulse-width modulated based on the detected output. A telephone extension line interface circuit device characterized in that each line interface circuit is provided with a control circuit that switches the switching circuit and supplies DC power to the line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10048283U JPS609366U (en) | 1983-06-29 | 1983-06-29 | Telephone extension interface circuit device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10048283U JPS609366U (en) | 1983-06-29 | 1983-06-29 | Telephone extension interface circuit device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS609366U true JPS609366U (en) | 1985-01-22 |
Family
ID=30237686
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10048283U Pending JPS609366U (en) | 1983-06-29 | 1983-06-29 | Telephone extension interface circuit device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS609366U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6432750U (en) * | 1987-08-21 | 1989-03-01 |
-
1983
- 1983-06-29 JP JP10048283U patent/JPS609366U/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6432750U (en) * | 1987-08-21 | 1989-03-01 |
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