| 发明名称 |
CONNECTION CONTROL SYSTEM |
| 摘要 |
PURPOSE:To enhance the economical properties of the exchange as well as the service to the customers by monitoring the patching cord condition through PBX. |
| 申请公布号 |
JPS547216(A) |
申请公布日期 |
1979.01.19 |
| 申请号 |
JP19770072072 |
申请日期 |
1977.06.20 |
| 申请人 |
HITACHI LTD |
发明人 |
TANIHARA MICHIHIRO;SHIMAOKA YASUYUKI;NAKADA MASATOSHI |
| 分类号 |
H04M3/22;H04M3/32 |
主分类号 |
H04M3/22 |
| 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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