发明名称 Protection switching of interface cards in communication system
摘要 A communication system includes primary and secondary interface cards. A switching circuit allows both of the interface cards to selectively communicate over a medium without inducing reflection. Further, an automatic detection system is provided to allow a management circuit to identify which interface card is coupled as the primary or secondary card.
申请公布号 US2003196135(A1) 申请公布日期 2003.10.16
申请号 US20020119483 申请日期 2002.04.10
申请人 ADC DSL SYS INC 发明人 GOTTLIEB GARY
分类号 H04M3/00;H04M3/12;H04M3/18;(IPC1-7):H02H3/05 主分类号 H04M3/00
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