JPS6114566U - Boost circuit for telephone terminal equipment - Google Patents
Boost circuit for telephone terminal equipmentInfo
- Publication number
- JPS6114566U JPS6114566U JP9745384U JP9745384U JPS6114566U JP S6114566 U JPS6114566 U JP S6114566U JP 9745384 U JP9745384 U JP 9745384U JP 9745384 U JP9745384 U JP 9745384U JP S6114566 U JPS6114566 U JP S6114566U
- Authority
- JP
- Japan
- Prior art keywords
- line
- telephone
- control circuit
- terminal equipment
- telephone terminal
- 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
Landscapes
- Sub-Exchange Stations And Push- Button Telephones (AREA)
- 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
図面は本考案の一実施例を示す回路図である。
ＣＯは局線、ＣＯＴは局線制御回路、ＮＲは負性抵抗回
路、ＣＮＴはトランジスタ制御回路、ＳＷ，ＳＵＢはス
イッチング装置および内線制御回路、Ｔ１〜Ｔｎは内線
電話機である。The drawing is a circuit diagram showing an embodiment of the present invention. CO is an office line, COT is an office line control circuit, NR is a negative resistance circuit, CNT is a transistor control circuit, SW and SUB are switching devices and extension control circuits, and T1 to Tn are extension telephones.
Claims (1)
内線電話機間の電話回線路に介挿され一方向の回線電流
を検出するトランジスタと一方向導通素子の直列回路と
、この回線電流が検出されたとき動作し−て前記一方向
導通素子を逆バイアスさせるトランジスタ制御回路を備
え、更に回線電流・ が検出され、前記トランジスタ制
御回路が前Ｅ一方向導通素子を逆バイアスさせたとき、
電話回線路に直列に印可させる局部直流電源を有するこ
とを特徴とする電話回線用負性抵抗回路装置。In a PBX or button telephone device, a series circuit of a transistor and a one-way conduction element inserted in a telephone line between a central office line control circuit and an extension telephone to detect one-way line current, and when this line current is detected. a transistor control circuit that operates to reverse bias the one-way conduction element, further comprising: a transistor control circuit that operates to reverse bias the one-way conduction element;
A negative resistance circuit device for a telephone line, comprising a local DC power supply applied in series to the telephone line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9745384U JPS6114566U (en) | 1984-06-28 | 1984-06-28 | Boost circuit for telephone terminal equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9745384U JPS6114566U (en) | 1984-06-28 | 1984-06-28 | Boost circuit for telephone terminal equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6114566U true JPS6114566U (en) | 1986-01-28 |
| JPH0332130Y2 JPH0332130Y2 (en) | 1991-07-08 |
Family
ID=30657008
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9745384U Granted JPS6114566U (en) | 1984-06-28 | 1984-06-28 | Boost circuit for telephone terminal equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6114566U (en) |
-
1984
- 1984-06-28 JP JP9745384U patent/JPS6114566U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0332130Y2 (en) | 1991-07-08 |
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