| 发明名称 |
CIRCUIT TWOOWAY OPERATION SYSTEM |
| 摘要 |
PURPOSE:To realize a uniform use of the circuit and thus to secure the circuit twoway operation with no double catch by selecting the idle two-way circuit in the adverse order at the opposite exchange. |
| 申请公布号 |
JPS52133711(A) |
申请公布日期 |
1977.11.09 |
| 申请号 |
JP19760049934 |
申请日期 |
1976.05.04 |
| 申请人 |
HITACHI LTD;NIPPON TELEGRAPH & TELEPHONE |
发明人 |
KOSHIBA TADASHI;SAKURAI YASUO;ITOU HIROSHI |
| 分类号 |
H04Q3/54;H04M3/00;H04M7/10;H04Q3/545 |
主分类号 |
H04Q3/54 |
| 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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