发明名称 |
SUBSCRIBERS* TRANSMITTING TEST SYSTEM |
摘要 |
PURPOSE:To make it unnecessary to add the testing function by directly connecting with A.B lines of tested subscribers selected by the selective signal in the exclusive test line, and to exactly make the confirmation of normal operation of common control device and division between subscriber's line and the switchboard in case of trouble. |
申请公布号 |
JPS5243306(A) |
申请公布日期 |
1977.04.05 |
申请号 |
JP19750118766 |
申请日期 |
1975.10.03 |
申请人 |
HITACHI SEISAKUSHO KK;NIPPON DENSHIN DENWA KOSHA |
发明人 |
OKUDA SABUROU;SHIMADA JIROU;IINO YOSHIROU |
分类号 |
H04M3/26;H04M3/30 |
主分类号 |
H04M3/26 |
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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