JPS6464459A - Communication equipment - Google Patents
Communication equipmentInfo
- Publication number
- JPS6464459A JPS6464459A JP22138787A JP22138787A JPS6464459A JP S6464459 A JPS6464459 A JP S6464459A JP 22138787 A JP22138787 A JP 22138787A JP 22138787 A JP22138787 A JP 22138787A JP S6464459 A JPS6464459 A JP S6464459A
- Authority
- JP
- Japan
- Prior art keywords
- calling signal
- detection
- signal
- pattern
- magnetic field
- 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
Abstract
PURPOSE:To simplify the detection of a call by detecting the presence and absence of a calling signal with an output from a means to detect a magnetic field to be generate in correspondence to the calling signal. CONSTITUTION:When a calling signal 16Hz passes from a telephone line 1 through a relay 3 and the bell of a telephone set 2 is rung, the magnetic field, which is generated around a pattern by a current to flow at such a time, is detected with a magnetic sensor 4. Thus, the signal of a calling signal 5 is analyzed by a micro-computer, etc., and the detection of the calling signal is executed. By fixing the magnetic sensor 4 on the pattern of a calling signal detecting circuit, the detection of the calling signal can be easily executed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22138787A JPS6464459A (en) | 1987-09-03 | 1987-09-03 | Communication equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22138787A JPS6464459A (en) | 1987-09-03 | 1987-09-03 | Communication equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6464459A true JPS6464459A (en) | 1989-03-10 |
Family
ID=16765975
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22138787A Pending JPS6464459A (en) | 1987-09-03 | 1987-09-03 | Communication equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6464459A (en) |
-
1987
- 1987-09-03 JP JP22138787A patent/JPS6464459A/en active Pending
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