I'm in the process of learning about how SFP+ modules work under the hood. I chose a 10GBASE-T transceiver module as my case study. The module I chose is said to be complaint with SFF-8431 spec, so when I look this up on Wikipedia:
It looks like the interface would be XGMII. This interface is
the "MDI" interface, correct? Does the transceiver implements the entire PHY (LDPC PCS, PMA, AN) or is it just a glorified ADC/DAC?
How would I figure out what the interface should be for ones that don't list anything under "MAC block to a PHY chip?"