how to use xbee for RCM4000

hi friends,
I need to transfer the sensor data to RCM4000 through xbee module. xbee has inbuild ADC. i need to select 3 analog lines for my project. then should i use AT commends for using ADC for this purpose?

if so then how do i do? what commends should i use and how to use?
how to configure my RCM4000 for this xbee?