Why would a Phase 2 system have Phase 1 transmissions? I was listening to LA-RICS on my P25P1 scanner the other day, and was surprised to hear a Phase 1 conversation. (The only time I've ever heard that). Are certain talkgroups assigned to use Phase 1, and the rest are the default (P2)? I can't imagine that phase type would be user-selectable, so it must be controlled by the system software at the talk-group level? I honestly never expected to hear a phase 1 transmission on LA-RICS.