| 发明名称 |
TESTING FOR SUBSCRIBER S LINE |
| 摘要 |
PURPOSE:To enable the tests with high precison and good operation by connecting a subscriber's line to the measuring circuit regardless of impedance state of the line at the switchboard with a semiconductor channel. |
| 申请公布号 |
JPS5283110(A) |
申请公布日期 |
1977.07.11 |
| 申请号 |
JP19750158563 |
申请日期 |
1975.12.30 |
| 申请人 |
HITACHI LTD |
发明人 |
MUKAEMACHI TAKUJI;FUKUSHIMA YUTAKA |
| 分类号 |
H04M3/26;H04M3/30 |
主分类号 |
H04M3/26 |
| 代理机构 |
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代理人 |
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| 主权项 |
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| 地址 |
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