JPS61100093U - - Google Patents
Info
- Publication number
- JPS61100093U JPS61100093U JP18495784U JP18495784U JPS61100093U JP S61100093 U JPS61100093 U JP S61100093U JP 18495784 U JP18495784 U JP 18495784U JP 18495784 U JP18495784 U JP 18495784U JP S61100093 U JPS61100093 U JP S61100093U
- Authority
- JP
- Japan
- Prior art keywords
- telephone line
- telephone
- key telephones
- button
- supplies power
- 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
- 238000010586 diagram Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Devices For Supply Of Signal Current (AREA)
- Sub-Exchange Stations And Push- Button Telephones (AREA)
Description
図は本考案の実施例を示し、第１図はＩＰＦの
回路図、第２図はＫＳＵのブロツク図である。
１……ＫＳＵ（主装置）、４，４ａ，４ｂ……
通話線、６……ＩＰＦ（内線電源供給回路）、１
３……ＣＵＴ（制御部）、Ｔ１……変成器（イン
ピーダンス素子）、Ｐ１，Ｐ２……１次巻線、Ｑ
１……トランジスタ（スイツチング素子）。
The figures show an embodiment of the present invention, with FIG. 1 being a circuit diagram of the IPF and FIG. 2 being a block diagram of the KSU. 1...KSU (main unit), 4, 4a, 4b...
Call line, 6...IPF (internal power supply circuit), 1
3...CUT (control unit), T1 ...transformer (impedance element), P1 , P2 ...primary winding, Q
1 ...Transistor (switching element).
Claims (1)
装置から通話線を介し前記各ボタン電話機へ内線
通話用の電源を供給すると共に、オンフツク状態
においても前記各ボタン電話機が前記通話線に対
し直流の流通状態となつているボタン電話装置に
おいて、前記通話線に対し通話用の電源を供給す
ると共に音声信号に対して高インピーダンスを呈
するインピーダンス素子と、該インピーダンス素
子と直列に挿入され少くとも前記ボタン電話機が
通話線に対して音声信号の送出を行なうときにオ
ンとなるスイツチング素子とを備えたことを特徴
とするボタン電話装置の内線電源供給回路。 Consisting of a plurality of key telephones and a main device, the main device supplies power for extension calls to each of the key telephones via a telephone line, and even in the on-hook state, each of the key telephones supplies direct current to the telephone line. In a button telephone device that is in circulation, an impedance element that supplies power for communication to the telephone line and exhibits high impedance to voice signals, and at least the button telephone that is inserted in series with the impedance element. 1. An extension power supply circuit for a button telephone device, comprising a switching element that is turned on when the terminal transmits a voice signal to a telephone line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1984184957U JPH0537592Y2 (en) | 1984-12-07 | 1984-12-07 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1984184957U JPH0537592Y2 (en) | 1984-12-07 | 1984-12-07 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61100093U true JPS61100093U (en) | 1986-06-26 |
| JPH0537592Y2 JPH0537592Y2 (en) | 1993-09-22 |
Family
ID=30742440
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1984184957U Expired - Lifetime JPH0537592Y2 (en) | 1984-12-07 | 1984-12-07 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0537592Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5514367U (en) * | 1978-07-07 | 1980-01-29 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5442303A (en) * | 1978-02-20 | 1979-04-04 | Nippon Steel Corp | Detection of blast furnace content conditions |
-
1984
- 1984-12-07 JP JP1984184957U patent/JPH0537592Y2/ja not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5514367U (en) * | 1978-07-07 | 1980-01-29 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0537592Y2 (en) | 1993-09-22 |
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