发明名称 |
Alarm panel with cellular communications backup |
摘要 |
An alarm panel of a security system communicates with a remote monitoring arrangement using a cellular communication protocol which deports from the conventional AMPS protocol and is less vulnerable to fraudulent activities. The modified protocol reduces transmissions from the cellular arrangement to the cell site by ignoring query signals. The cellular arrangement continues to monitor received cellular transmissions to provide an assessment of the ability to respond.
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申请公布号 |
US6032037(A) |
申请公布日期 |
2000.02.29 |
申请号 |
US19970991772 |
申请日期 |
1997.12.16 |
申请人 |
SUR-GARD SECURITY SYSTEMS LTD. |
发明人 |
JEFFERS, JOHN MICHAEL |
分类号 |
H04M1/66;H04M1/68;H04M3/16;H04M11/00;(IPC1-7):H04M11/00 |
主分类号 |
H04M1/66 |
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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