| 发明名称 |
AUDIBLE SIGNAL SOUND SIGNAL DETECTION SYSTEM |
| 摘要 |
PURPOSE:To secure an automatic detection of audible signal sound such as a transmission sound, etc. by detecting the fact that the input signal exceeds the reference level and continues more than a fixed reference time in a communication network. |
| 申请公布号 |
JPS5363910(A) |
申请公布日期 |
1978.06.07 |
| 申请号 |
JP19760138392 |
申请日期 |
1976.11.19 |
| 申请人 |
OKI ELECTRIC IND CO LTD |
发明人 |
SUZUKI YOSHIKAZU;MANBA HIROSHI |
| 分类号 |
H04Q1/45;H04L27/00;H04M3/22;H04Q1/446 |
主分类号 |
H04Q1/45 |
| 代理机构 |
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