JPS63171053U - - Google Patents
Info
- Publication number
- JPS63171053U JPS63171053U JP6357587U JP6357587U JPS63171053U JP S63171053 U JPS63171053 U JP S63171053U JP 6357587 U JP6357587 U JP 6357587U JP 6357587 U JP6357587 U JP 6357587U JP S63171053 U JPS63171053 U JP S63171053U
- Authority
- JP
- Japan
- Prior art keywords
- dial
- cpu
- switch matrix
- power
- lsi
- 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
- 239000011159 matrix material Substances 0.000 claims description 7
- 238000010586 diagram Methods 0.000 description 2
Description
第１図は本考案のボタン電話機のダイヤル回路
の回路図、第２図は従来のボタン電話機のダイヤ
ル回路の回路図である。
１……ダイヤル用スイツチマトリツクス、２，
９……リレー接点群、３……ＣＰＵ、４……ダイ
ヤル用ＬＳＩ、５……通電時ダイヤル用スイツチ
マトリツクス、６……停電時ダイヤル用スイツチ
マトリツクス、７……通電時ダイヤル用ＬＳＩ、
８……停電時ダイヤル用ＬＳＩ。
FIG. 1 is a circuit diagram of a dialing circuit of a button telephone according to the present invention, and FIG. 2 is a circuit diagram of a dialing circuit of a conventional button telephone. 1...Dial switch matrix, 2,
9... Relay contact group, 3... CPU, 4... LSI for dialing, 5... Switch matrix for dialing when energized, 6... Switch matrix for dialing during power outage, 7... LSI for dialing when energized,
8... LSI for dialing during power outage.
Claims (1)
を前記ＣＰＵの入力端子へ切り替え接続し、停電
時は前記ダイヤル用スイツチマトリツクスを前記
ＣＰＵの出力端子へ切り替え接続する回路と、 前記ＣＰＵの出力端子に接続されたダイヤル用
ＬＳＩとを備え、 前記ダイヤル用スイツチマトリツクスと前記ダ
イヤル用ＬＳＩとを、通電時および停電時に共用
することを特徴とするボタン電話機のダイヤル回
路。[Scope of Claim for Utility Model Registration] A switch matrix for dial, a CPU, and when the power is on, the switch matrix for the dial is switched to the input terminal of the CPU, and when the power is out, the switch matrix for the dial is connected to the input terminal of the CPU. and a dial LSI connected to the output terminal of the CPU, and the dial switch matrix and the dial LSI are commonly used during power supply and power outage. The dialing circuit of a button telephone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6357587U JPS63171053U (en) | 1987-04-28 | 1987-04-28 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6357587U JPS63171053U (en) | 1987-04-28 | 1987-04-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63171053U true JPS63171053U (en) | 1988-11-08 |
Family
ID=30898933
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6357587U Pending JPS63171053U (en) | 1987-04-28 | 1987-04-28 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63171053U (en) |
-
1987
- 1987-04-28 JP JP6357587U patent/JPS63171053U/ja active Pending