RPS communications are primarily on SouthernLINC, however their VHF system is still used occasionally for administrative type comms, and when their dispatch center is unable to raise a unit on the Linc. The UHF side of this system is used for remote links to their tower sites.
Here is what I have logged for their VHF system:
Winston VHF: 155.160 (110.9 PL)
Walker VHF (repeated): 156.225 (162 DPL)
Jefferson VHF: 155.220 (151.4 PL)
St. Claire VHF (repeated): 155.325 (162 DPL)
I haven't attempted to monitor any of these except for the Winston tower in a year or two, so PLs may have changed or some towers may no longer be used. I do know they recently updated the infrastructure at the dispatch center and the Winston tower.