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[802.3ae] ask some questions

Sorry, I will ask some questions, and thanks for your helping.

1. 10GBASE-W PHYs operate at the STS-192 line rate of 9.95328 Gb/s,
mapping the encoded
    data stream at a 9.58464 Gb/s payload rate. The number "9.58464" is
how to calculate?

2. In the 802.3ae spec, link fault signaling of XGMII functional
specifications in Clause46,
    what does "UCT" mean in figure46-9 (Link Fault signaling state
machine, page256)?

3.The 10GBASE-R PCS sends tx_data-unit<15:0> to the WIS at a nominal
rate of 599.04Mhz
   The number "599.04" is how to calculate?