发明名称 |
Power-up system for line-powered telephones |
摘要 |
A speaker-phone telephone, in which a speaker-microphone unit is powered by wall current, and a separate telephone is separately powered, by telephone line current. The speaker-microphone unit contains a switch by which a user can call for a speaker-phone call. The switch initiates a signal, which is held in existence, until a microprocessor detects the signal, and removes it.
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申请公布号 |
US5943420(A) |
申请公布日期 |
1999.08.24 |
申请号 |
US19960727893 |
申请日期 |
1996.10.09 |
申请人 |
LUCENT TECHNOLOGIES, INC. |
发明人 |
BONHOMME, FREDERICK JOSEPH;HOLTZ, ROGER EDWARD |
分类号 |
H04M9/08;H04M19/08;(IPC1-7):H04M1/00 |
主分类号 |
H04M9/08 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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