| 发明名称 |
DETECTION SYSTEM FOR TRUNK INVALIDITY SUSPENSION |
| 摘要 |
PURPOSE:To reduce the maintenance load and perform the stable exchange service by monitoring the state memory circuit provided in every trunk and detecting automatically trunk invalidity suspension. |
| 申请公布号 |
JPS5429907(A) |
申请公布日期 |
1979.03.06 |
| 申请号 |
JP19770096235 |
申请日期 |
1977.08.10 |
| 申请人 |
NIPPON ELECTRIC CO |
发明人 |
SAKAKIBARA SHIYUUHEI;FUJIMORI SHIGERU;OKA SHIYUUJI |
| 分类号 |
H04M3/22;H04M3/28;H04Q3/42 |
主分类号 |
H04M3/22 |
| 代理机构 |
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代理人 |
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| 地址 |
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