| 发明名称 |
BLOCKING AND STARTING SYSTEM IN BIDIRECTIONAL LINES |
| 摘要 |
PURPOSE:To decrease the call collision by discrimiaating the start signal from the block signal in telephone exchanging system, and to enable economy by eliminating ineffective start and hold of the common control unit. |
| 申请公布号 |
JPS52120604(A) |
申请公布日期 |
1977.10.11 |
| 申请号 |
JP19760036045 |
申请日期 |
1976.04.02 |
| 申请人 |
HITACHI LTD |
发明人 |
SHINKAWA SEIZOU;INOUE KENSUKE |
| 分类号 |
H04Q1/30;H04M7/10;H04Q3/00 |
主分类号 |
H04Q1/30 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
|
| 地址 |
|
