I got AAR to work with location but do not understand it.

I had DevicePool setup with Locations, AAR Group, and AAR CSS but that didn't work so I had to do the following on top of the DP to work

Setup AAR group on Line config for phone but left device config location to <none>

Setup AAR group on both line and device for VM port as well as AAR CSS/Location on device part of the VM port

Setup AAR group and location on the GW

Initially, I thought setting up AARgroup, AARcss and location in DP would be the only thing but apparently not. I had to go to the specific device and line config page of phones, VM port, and GW and via process of elimination to get it to work.

I am on 4.2.3sr1 so my question is what is the difference in DP versus the specific configs for each devise?

I dig through the cco and srnd and can't find some insight on how this works.