I didn't realize they were doing two-way voice comm's now over the PAS. When I used to maintain Coxsacie & Greene's radio systems they only used the PAS for control to CO announcements. If a CO with a PAS radio wanted to send a "minor" alarm, they would click the PTT and send the GE-STAR ID. If it was a "major" alarm, then they would pull the pin and send the GE-STAR Emergency ID.
But from what I understand, most facilities are replacing the M/A-Com Panther 605P portables with a Kenwood radio (I don't know the exact model). I was told it is cheaper for DOCS to replace the radios rather than pay to repair, and the cost of the Kenwood radios is (or was) considerably less than the 605P when they were being manufactured.
Before I left the two-way radio business last September, Greene CF already was using Kenwood radios for the PAS system, and I think Coxsackie was getting ready to switch over. The maintenance staff at Coxsackie was already using Kenwood portables. The mobiles at both facilities were still M/A-Com Orion dual-band mobiles, VHF & UHF.
Since Harris took over, I don't believe they offer a low-cost product, either mobile or portable.