I've been noticing OKC FD telling responding units to respond to calls on "the EMSA channel" lately...but no traffic was ever seen on the database TG556 (analog or digital - used UniTrunker). I did see a new talkgroup on the city system - TG558 - and it was "just" digital...no encryption. Running DSDplus, and WHOA - you can hear EMSA again!!! OKC EDACS TG558 is linked to OKWIN TG 12912. I guess the guys in charge of that stuff figure ProVoice is almost like encryption (but it's not).