The J1 and J2 SMA ports of XCVR2450

Hi GRers,

I found the J1 port is by default for transmitting and J2 for receiving.
But the circuit shows that this could be changed.
How to configure it in software, just like selecting from ports “TX/RX”
“RX2” of RFX2450?
And does XCVR2450 support auto T/R for half duplexing on a single RF

Thanks in advance.