10GBase-T link speed arbitration for 30m transceivers
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United States of America Patent
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Issued Date -
Sep 11, 2008
app pub date -
Nov 13, 2007
filing date -
Nov 15, 2006
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A method of power management in a 10GBase-T Ethernet transceiver is provided. The 10GBase-T Ethernet transceiver is according to an IEEE 802.3an standard. The method includes determining a cable length from a transmitter to a receiver in the Ethernet. A low-power mode of the transceiver is enabled when the cable length is determined to be 30-meters or less, and the low-power mode of the transceiver is disabled when the cable length is determined to be greater than 30-meters. The cable length determination can be accomplished using time domain reflectometry prior to an auto-negotiation process, during the auto-negotiation process, or through interrogation of a management interface. The transceiver can be monitored, where an operational link speed is reduced when transmit and receive data is below a predetermined level for a predetermined duration.
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