JPS601074U - Telephone extension calling circuit - Google Patents
Telephone extension calling circuitInfo
- Publication number
- JPS601074U JPS601074U JP9245883U JP9245883U JPS601074U JP S601074 U JPS601074 U JP S601074U JP 9245883 U JP9245883 U JP 9245883U JP 9245883 U JP9245883 U JP 9245883U JP S601074 U JPS601074 U JP S601074U
- Authority
- JP
- Japan
- Prior art keywords
- extension calling
- circuit
- calling circuit
- telephone extension
- telephone
- 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
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図は従来の回路の一例を示す図、第２図は “
本考案の一実施例の回路を示す図である。
１９〜２１・・・呼出し発着信回路、２２・・・接続線
、２３〜２９・・・抵抗、３０〜３５・・・呼出しスイ
ッチ、３６〜４０・・・定電圧ダイオード、４３〜４８
・・・トランジスタ、４９〜５１・・・発音体、４１
、 ４２・・・ダイオード、１００，１０１，１０２・
・・端子。Figure 1 is a diagram showing an example of a conventional circuit, and Figure 2 is a diagram showing an example of a conventional circuit.
FIG. 1 is a diagram showing a circuit of an embodiment of the present invention. 19-21... Calling originating/receiving circuit, 22... Connection line, 23-29... Resistor, 30-35... Calling switch, 36-40... Constant voltage diode, 43-48
...Transistor, 49-51...Sounding body, 41
, 42...diode, 100, 101, 102...
...Terminal.
Claims (1)
抵抗分割により異った電圧を与える回路と、受信部に前
記発信部の設定電圧に従って動作する、定電圧ダイオー
ドとトランジスタとを有する２個のスイッチング回路と
を具備してなる各々の電話機の内線呼出し発着信回路間
が、１本の接続線で接続されていることを特徴とする電
話機の内線呼出し回路。In an extension calling circuit between a plurality of telephones, a circuit that applies different voltages to a transmitting section by resistance division, and a receiving section that has two constant voltage diodes and transistors that operate according to the set voltage of the transmitting section. 1. An extension calling circuit for a telephone, characterized in that the extension calling/receiving circuits of each telephone equipped with a switching circuit are connected by one connection line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9245883U JPS601074U (en) | 1983-06-16 | 1983-06-16 | Telephone extension calling circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9245883U JPS601074U (en) | 1983-06-16 | 1983-06-16 | Telephone extension calling circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS601074U true JPS601074U (en) | 1985-01-07 |
Family
ID=30222688
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9245883U Pending JPS601074U (en) | 1983-06-16 | 1983-06-16 | Telephone extension calling circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS601074U (en) |
-
1983
- 1983-06-16 JP JP9245883U patent/JPS601074U/en active Pending
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