JPS6337547B2 - - Google Patents
Info
- Publication number
- JPS6337547B2 JPS6337547B2 JP14797383A JP14797383A JPS6337547B2 JP S6337547 B2 JPS6337547 B2 JP S6337547B2 JP 14797383 A JP14797383 A JP 14797383A JP 14797383 A JP14797383 A JP 14797383A JP S6337547 B2 JPS6337547 B2 JP S6337547B2
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- signal
- office line
- called party
- relay
- 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.)
- Expired
Links
- 238000001514 detection method Methods 0.000 claims description 22
- 230000003213 activating effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 5
- 230000002265 prevention Effects 0.000 description 5
- 238000012544 monitoring process Methods 0.000 description 3
- 230000004913 activation Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
- H04M11/04—Telephonic communication systems specially adapted for combination with other electrical systems with alarm systems, e.g. fire, police or burglar alarm systems
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14797383A JPS6039970A (ja) | 1983-08-15 | 1983-08-15 | 極性反転検出回路 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14797383A JPS6039970A (ja) | 1983-08-15 | 1983-08-15 | 極性反転検出回路 |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6039970A JPS6039970A (ja) | 1985-03-02 |
JPS6337547B2 true JPS6337547B2 (no) | 1988-07-26 |
Family
ID=15442285
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14797383A Granted JPS6039970A (ja) | 1983-08-15 | 1983-08-15 | 極性反転検出回路 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6039970A (no) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61131953A (ja) * | 1984-11-30 | 1986-06-19 | Fujitsu Ltd | 極性反転検出方式 |
JPS61224551A (ja) * | 1985-03-28 | 1986-10-06 | Nitsuko Corp | 非常通報装置におけるメツセ−ジ終了判断方式 |
JPS61267494A (ja) * | 1985-05-22 | 1986-11-27 | Matsushita Electric Ind Co Ltd | 構内電子交換機 |
JPS62207057A (ja) * | 1986-03-07 | 1987-09-11 | Nec Corp | 網制御装置 |
JPH01209845A (ja) * | 1988-02-17 | 1989-08-23 | Rohm Co Ltd | 電話回線の極性反転検出装置 |
-
1983
- 1983-08-15 JP JP14797383A patent/JPS6039970A/ja active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS6039970A (ja) | 1985-03-02 |
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