发明名称 |
Integrated modem and line-isolation circuitry and associated method utilizing a DC termination pin to monitor line voltage |
摘要 |
An improved modem architecture and associated method are disclosed that integrate modem and line-isolation circuitry so as to achieve modem functionality and system-side isolation functionality on a single integrated circuit. The combined modem and line isolation system has both on-hook and off-hook intrusion detection for use with parallel connected phone line connection devices. During on-hook intrusion detection, when the combined modem and line isolation system is on-hook the system can detect if other parallel connected phone line connection devices are already off-hook. During off-hook intrusion detection, when the combined modem and line isolation system is off-hook the system can detect if other parallel connected phone line connection devices are attempting to go off-hook. On-hook intrusion detection may be accomplished by monitoring the phone line voltage through a pin utilized for setting DC termination characteristics.
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申请公布号 |
US6771696(B1) |
申请公布日期 |
2004.08.03 |
申请号 |
US20000603022 |
申请日期 |
2000.06.26 |
申请人 |
SILICON LABORATORIES INC. |
发明人 |
TUTTLE GEORGE T.;HUANG YUNTENG;DUPUIS TIMOTHY J. |
分类号 |
H04L29/10;H04L25/49;H04L27/00;(IPC1-7):H04B1/38 |
主分类号 |
H04L29/10 |
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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