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发明名称
RING BACK TONE SERVICE METHOD FOR PRIVATE BRANCH EXCHANGE NETWORK
摘要
申请公布号
KR100588368(B1)
申请公布日期
2006.06.02
申请号
KR20050108573
申请日期
2005.11.14
申请人
SOLUTECH CO., LTD.
发明人
CHOI, BYUNG SUL
分类号
H04Q3/54
主分类号
H04Q3/54
代理机构
代理人
主权项
地址
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