发明名称 |
Telephone with unified features for hearing and deaf users |
摘要 |
A unified TDD and telephone incorporate intelligent mode switching to permit users of either device to use the integrated unit with the other features remaining largely invisible by sensing various signals including the removal of the handset or the turning on and off of the TDD device to determine the likely mode of a transmission and the detection of text to determining the likely mode of the receive text. This intelligent mode conversion includes a voice carryover mode in which text and voice may both be transmitted.
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申请公布号 |
US5604786(A) |
申请公布日期 |
1997.02.18 |
申请号 |
US19940258044 |
申请日期 |
1994.06.10 |
申请人 |
ULTRATEC, INC. |
发明人 |
ENGELKE, ROBERT M.;COLWELL, KEVIN R.;SCHULTZ, RONALD W.;VITEK, TROY |
分类号 |
H04M1/247;H04M1/2745;H04M11/06;(IPC1-7):H04M11/00 |
主分类号 |
H04M1/247 |
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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