| 发明名称 |
DELIVERY SYSTEM FOR CALL SIGNAL |
| 摘要 |
PURPOSE:To reduce the time of silent condition in calling out a subscriber at incoming call, by using a plural number of call-out intermittent signal sources having different phases. |
| 申请公布号 |
JPS53132208(A) |
申请公布日期 |
1978.11.17 |
| 申请号 |
JP19770047080 |
申请日期 |
1977.04.22 |
| 申请人 |
NIPPON ELECTRIC CO |
发明人 |
SHIMIZU JIYUNICHI;INOUE SATOSHI |
| 分类号 |
H04M3/02;(IPC1-7):04M3/02 |
主分类号 |
H04M3/02 |
| 代理机构 |
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