| 发明名称 |
TRUNK ORIGINATING CONTROL SYSTEM |
| 摘要 |
PURPOSE:To prevent unjustifiable toll originating dialing easily and economically, by providing a dial-time supervisory relay and time-difference detection relay to a PBX. |
| 申请公布号 |
JPS542603(A) |
申请公布日期 |
1979.01.10 |
| 申请号 |
JP19770066682 |
申请日期 |
1977.06.08 |
| 申请人 |
HITACHI LTD |
发明人 |
TSUJINO KENSHIYOU;HANADA GOROU;USUI AKIHIRO |
| 分类号 |
H04Q3/58;H04Q3/62 |
主分类号 |
H04Q3/58 |
| 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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