[Repeater-Builder] what pac-rt means

[George]

i have MTVA converta-com 800mhz with the mts2000 inside the cradle and the 
control unit NTN1325B has amplifier in it and switching RF TX-RX relay. i hear 
it clicking between PTT. now the cradle has a switch that says PAC-RT on and 
off. what does this do? (no manual)