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发明名称
Apparatus and method for detecting telephone line status
摘要
申请公布号
EP0617533(B1)
申请公布日期
2000.05.31
申请号
EP19940301894
申请日期
1994.03.16
申请人
AT&T CORP.
发明人
BURGER, THEODORE OTHMAR;KARPICKE, JOHN ARTHUR;KENN, DONALD MARION;MEANS, DONALD RICHARD;STAHL, THOMAS ANTHONY;WITTMAN, BRIAN ALBERT
分类号
H04M1/82;(IPC1-7):H04M1/00
主分类号
H04M1/82
代理机构
代理人
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