JPS61143361U - - Google Patents
Info
- Publication number
- JPS61143361U JPS61143361U JP2594685U JP2594685U JPS61143361U JP S61143361 U JPS61143361 U JP S61143361U JP 2594685 U JP2594685 U JP 2594685U JP 2594685 U JP2594685 U JP 2594685U JP S61143361 U JPS61143361 U JP S61143361U
- Authority
- JP
- Japan
- Prior art keywords
- hook
- monitoring
- load resistance
- monitoring means
- resistor
- 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
- 238000012544 monitoring process Methods 0.000 claims description 10
- 238000010586 diagram Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 1
Description
第１図は従来の電話の自動発信装置を示すブロ
ツク図、第２図は従来の電話の自動発信装置の動
作を説明するための流れ図、第３図は従来の電話
の自動発信装置の極性監視回路を示す回路図、第
４図は本考案の極性監視回路を用いた自動発信装
置を示すブロツク図、第５図は本考案の一実施例
を示す回路図および第６図は本考案の一実施例の
動作を説明するための流れ図である。
図において、１……回線、２……回線、３……
フツク・スイツチ、４……オン・フツク側、５…
…オフ・フツク側、６……極性監視回路、７……
極性監視回路、８……音声帯域信号入出力回路、
９……選択信号出力回路、１２……ホト・カプラ
、１３……ホト・カプラ、１４……電源端子、１
６……負荷抵抗、１７……電流制限抵抗、１８…
…出力端子、１９……出力端子、２７……極性監
視回路、３７……オン・フツク時用負荷抵抗、３
８……オフ・フツク時用負荷抵抗、３９……負荷
抵抗切換スイツチ、４０……オン・フツク側、４
１……オフ・フツク側。
Figure 1 is a block diagram showing a conventional automatic telephone dialing device, Figure 2 is a flowchart to explain the operation of the conventional automatic telephone dialing device, and Figure 3 is polarity monitoring of a conventional automatic telephone dialing device. FIG. 4 is a block diagram showing an automatic transmission device using the polarity monitoring circuit of the present invention, FIG. 5 is a circuit diagram showing an embodiment of the present invention, and FIG. 6 is a circuit diagram showing an embodiment of the present invention. It is a flowchart for explaining the operation of the embodiment. In the figure, 1... line, 2... line, 3...
Hook switch, 4...On hook side, 5...
...Off hook side, 6...Polarity monitoring circuit, 7...
Polarity monitoring circuit, 8...Audio band signal input/output circuit,
9... Selection signal output circuit, 12... Photo coupler, 13... Photo coupler, 14... Power supply terminal, 1
6...Load resistance, 17...Current limiting resistance, 18...
...Output terminal, 19...Output terminal, 27...Polarity monitoring circuit, 37...Load resistance for on-hook, 3
8...Load resistance for off-hook, 39...Load resistance selection switch, 40...On-hook side, 4
1...Off hook side.
Claims (1)
監視手段と、相互に抵抗値の異なる第１および第
２の抵抗と、オン・フツク時に前記第１の抵抗を
前記監視手段の負荷抵抗として選択するとともに
オフ・フツク時に前記第２の抵抗を前記監視手段
の負荷抵抗として選択するよう電話機のフツク・
スイツチと連動する選択手段とを含むことを特徴
とする電話用極性監視回路。 A monitoring means for monitoring the level of potential of the first and second lines, first and second resistors having mutually different resistance values, and the first resistor serving as a load resistance of the monitoring means when on-hook. the second resistor as the load resistance of the monitoring means when off-hook;
A polarity monitoring circuit for a telephone, comprising a selection means interlocked with a switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2594685U JPS61143361U (en) | 1985-02-25 | 1985-02-25 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2594685U JPS61143361U (en) | 1985-02-25 | 1985-02-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61143361U true JPS61143361U (en) | 1986-09-04 |
Family
ID=30521493
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2594685U Pending JPS61143361U (en) | 1985-02-25 | 1985-02-25 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61143361U (en) |
-
1985
- 1985-02-25 JP JP2594685U patent/JPS61143361U/ja active Pending
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