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发明名称
A METHOD, A SYSTEM AND A RING BACK TONE APPARATUS FOR OFFERING THE PRESENCE INFORMATION USING RING BACK TONE
摘要
申请公布号
EP2003865(A4)
申请公布日期
2010.06.09
申请号
EP20070702244
申请日期
2007.02.01
申请人
HUAWEI TECHNOLOGIES CO., LTD.
发明人
QI, QUAN;LIU, JIAN
分类号
H04M3/42
主分类号
H04M3/42
代理机构
代理人
主权项
地址
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