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发明名称
SPEECH CHANNEL SWITCH
摘要
PURPOSE:To simplify the circuit at every cross point to economize the whole speech channel by removing a memory crcuit from the cross point and separately integrating the high voltage circuit section and the low voltage crcuit section.
申请公布号
JPS5230103(A)
申请公布日期
1977.03.07
申请号
JP19750105910
申请日期
1975.09.03
申请人
HITACHI LTD
发明人
OKUHARA SHINJI
分类号
H04Q3/52
主分类号
H04Q3/52
代理机构
代理人
主权项
地址
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