JPS6355647U - - Google Patents
Info
- Publication number
- JPS6355647U JPS6355647U JP14640986U JP14640986U JPS6355647U JP S6355647 U JPS6355647 U JP S6355647U JP 14640986 U JP14640986 U JP 14640986U JP 14640986 U JP14640986 U JP 14640986U JP S6355647 U JPS6355647 U JP S6355647U
- Authority
- JP
- Japan
- Prior art keywords
- line
- polarity
- reversed
- switch
- control means
- 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
- 238000001514 detection method Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 1
Description
図は本考案の一実施例を示すブロツク図である
。
１…電話回線、２…フツクスイツチ、３…トー
ンリンガ回路、４…スピーカ、５…制御回路、６
…極性反転検出回路、７…通話回路、８…ハンド
セツト。
The figure is a block diagram showing one embodiment of the present invention. 1...Telephone line, 2...Hook switch, 3...Tone ringer circuit, 4...Speaker, 5...Control circuit, 6
...Polarity reversal detection circuit, 7. Call circuit, 8. Handset.
Claims (1)
的に開成して回線を解放する制御手段と、回線の
線間電圧の極性が反転したことを検出する極性反
転検出手段とを備え、前記極性反転検出手段が極
性反転を検出したことに基づき前記制御手段は回
線を解放することを特徴とする電話機。 A switch, a control means for forcibly opening the switch to release the line, and a polarity reversal detecting means for detecting that the polarity of the line voltage of the line has been reversed, and the polarity reversal detecting means detects when the polarity is reversed. The telephone set is characterized in that the control means releases the line based on the detection of the telephone line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14640986U JPS6355647U (en) | 1986-09-26 | 1986-09-26 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14640986U JPS6355647U (en) | 1986-09-26 | 1986-09-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6355647U true JPS6355647U (en) | 1988-04-14 |
Family
ID=31058850
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14640986U Pending JPS6355647U (en) | 1986-09-26 | 1986-09-26 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6355647U (en) |
-
1986
- 1986-09-26 JP JP14640986U patent/JPS6355647U/ja active Pending