| 发明名称 |
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| 摘要 |
PURPOSE:To enable to confirm the normality of the overall communication line switches, by providing the switch network for test and by detecting the presence of current flowing via the communication line switches. |
| 申请公布号 |
JPS584863(B2) |
申请公布日期 |
1983.01.28 |
| 申请号 |
JP19770012498 |
申请日期 |
1977.02.09 |
| 申请人 |
OKI DENKI KOGYO KK;NIPPON DENSHIN DENWA KOSHA |
发明人 |
NARA EIZO;YAMADA KATSUZO;YASUI NAOHIKO;AKYAMA NOBUYOSHI |
| 分类号 |
H04M3/26;H04Q3/00;H04Q3/52 |
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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