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发明名称
CAMPPON CONTROL SYSTEM FOR MUTUAL SUBSCRIBING LINE
摘要
PURPOSE:To detect dial error by verificating the caller and called subscriber with the common control unit, if the number is mis-dialed and to tell the caller the error by sending busy tone.
申请公布号
JPS534408(A)
申请公布日期
1978.01.17
申请号
JP19760077791
申请日期
1976.07.02
申请人
HITACHI LTD
发明人
TANIHARA MICHIHIRO
分类号
H04M3/48;(IPC1-7):04M3/48
主分类号
H04M3/48
代理机构
代理人
主权项
地址
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