| 发明名称 |
SWITCHING SYSTEM AT SYSTEM REVISION TIME |
| 摘要 |
PURPOSE:To secure a general switching from the old-type exchange to the electronic exchange by providing a program which controls the ON/OFF of the cut-off relay of each subscriber circuit for all stations. |
| 申请公布号 |
JPS53142107(A) |
申请公布日期 |
1978.12.11 |
| 申请号 |
JP19770057373 |
申请日期 |
1977.05.17 |
| 申请人 |
NIPPON ELECTRIC CO |
发明人 |
SUEYOSHI HIDEKIYO;INOUE SATOSHI |
| 分类号 |
H04M3/00;H04Q3/00 |
主分类号 |
H04M3/00 |
| 代理机构 |
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代理人 |
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