Patent ID: 7676592
Filing Date: 2010-03-09
Classification: H04L

Abstract:
1. A method of selecting a data signal source from amongst a plurality of potential sources, the method comprising: (a) selecting a source from amongst the plurality of potential sources; (b) enabling directional connection between the source and a physical interface using a biasing switch; (c) monitoring the source selected in step (a) at a programmable logic device for an indication of communication speed, wherein monitoring the source includes monitoring for an indication of a normal link pulse, a multi-level tier 3 pulse, and a fast link pulse received at the programmable logic device via a tri-state converter, the tri-state converter communicating to the programmable logic device a two-bit digital signal, each bit being carried on a separate line, indicating communication speed derived from a tri-state signal provided by the physical interface; (d) returning to step (a) if no indication of communication speed is observed; and (e) maintaining selection of the source of step (a) if an indication of communication speed is observed.