DP83TC811R-Q1: schematic review

Part Number:DP83TC811R-Q1

Hi,

Could you help review the schematic of dp83tc811?

1. The customer would like to do MII and RMII compatible design, is that ok? For unused MAC interface pins, can we leave it to float?

2. Why need CM termination/MDI coupling and ESD shunt circuit? How does it work? Can I remove the ESD protection?

Thanks

Dongbao