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发明名称
Programmable call progress tones for a switching system
摘要
申请公布号
GB2266820(B)
申请公布日期
1996.01.03
申请号
GB19930008617
申请日期
1993.04.26
申请人
* MITEL CORPORATION
发明人
JANICE C * HALLIGAN
分类号
H04M19/02;H04Q1/45;(IPC1-7):H04M19/02
主分类号
H04M19/02
代理机构
代理人
主权项
地址
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