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发明名称
UNTERSCHEIDBARE RUF- UND ANKLOPFTÖNE IN ISDN
摘要
申请公布号
DE69718621(D1)
申请公布日期
2003.02.27
申请号
DE19976018621
申请日期
1997.11.17
申请人
NORTEL NETWORKS LTD., ST.LAURENT
发明人
ZHANG, GENZAO;SANDLER, MARTIN;DOWLATSHAHI, SHAHRAM
分类号
H04M3/42;H04M3/428;H04M11/00;H04M19/04;H04Q7/32;H04Q11/04;(IPC1-7):H04M3/42
主分类号
H04M3/42
代理机构
代理人
主权项
地址
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