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经营范围
发明名称
Method and apparatus for detecting a customer premises equipment alerting (CAS) signal on a telephone line
摘要
The guard delay prevents false detection which could otherwise occur because speech or music signals provide the frequency content for the alert.
申请公布号
EP0936820(A1)
申请公布日期
1999.08.18
申请号
EP19990400313
申请日期
1999.02.10
申请人
MATRA NORTEL COMMUNICATIONS
发明人
BOULBEN, PATRICK;NIHOUARN, GILBERT
分类号
H04M1/57;H04Q1/46
主分类号
H04M1/57
代理机构
代理人
主权项
地址
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