发明名称 |
DIAL PULSE MAKE RATE MEASURING INSTRUMENT |
摘要 |
PROBLEM TO BE SOLVED: To reduce the make rate measurement error of a dial pulse even though the impedance of a circuit side changes and to improve measurement accuracy by converting a dial pulse signal into a digital value, monitoring the digital value to perform decision of make or break and measuring a make rate from the results. SOLUTION: When a telephone set transmits a dial pulse being a dial signal A, current is caused to flow into a circuit is changed. The circuit 10 of a testing machine converts the current into a voltage and eliminates chattering and noise through a filter to make it a dial signal B. An analog-to-digital conversion circuit 11 converts the signal B into a digital signal in a prescribed cycle. A processor 12 decides that the digital signal as break in the case the rate of change within fixed time is equal to or more than a fixed value and decides it as make when the rate of change is below the fixed value. The processor 12 reproduces a dial signal D based on these decisions and calculates a make rate based on the reproduced dial signal D.
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申请公布号 |
JP2000295640(A) |
申请公布日期 |
2000.10.20 |
申请号 |
JP19990096397 |
申请日期 |
1999.04.02 |
申请人 |
OKI COMTEC:KK;OKI ELECTRIC IND CO LTD |
发明人 |
MORIYA TORU;ONOMI NOBUYUKI |
分类号 |
H04Q1/32;(IPC1-7):H04Q1/32 |
主分类号 |
H04Q1/32 |
代理机构 |
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主权项 |
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