发明名称 |
Out-of-range warning system for cordless telephone |
摘要 |
The present invention relates to a cordless telephone unit having a handset and a base unit. The signal strength of a handset which is received by the base unit is examined to determine whether or not the handset is beyond a predetermined range from the base unit. If such determination of out-of-range is made, a warning signal is transmitted from the base unit to the handset and if the handset is not brought within range within a predetermined number of warning signals, a hang up is initiated wherein the handset is placed in an "on" hook condition and the captured telephone line is released.
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申请公布号 |
US5373548(A) |
申请公布日期 |
1994.12.13 |
申请号 |
US19940225368 |
申请日期 |
1994.04.08 |
申请人 |
THOMSON CONSUMER ELECTRONICS, INC. |
发明人 |
MCCARTHY, DENNIS R. |
分类号 |
H04B17/00;H04M1/725;(IPC1-7):H04M11/00;H04Q7/00 |
主分类号 |
H04B17/00 |
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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