Auto-sequencing transmission speed of a data port
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United States of America Patent
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Issued Date -
Aug 16, 2007
app pub date -
Feb 13, 2006
filing date -
Feb 13, 2006
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
Embodiments of methods of auto-sequencing transmission speed of a data port are disclosed. One method includes the data port executing auto-negotiation with a second data port, to determine a highest common transmission speed supported by the data port and the second data port, each port advertising transmission speeds the port can support. Transmission signal qualities of each of four pairs of wires of a cable connected to the data ports are determined. It is then determined whether the transmission signal qualities of the pairs is high enough to support a negotiated transmission speed. If transmission signal qualities of the pairs are below a threshold required for the negotiated transmission speed, then the transmission speed advertised by the port is updated depending upon a degree of failure of the transmission signal qualities of the pairs. The auto-negotiation is then re-executed.
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