That might be true that it's not a documented or even intentional feature on the GRE but it works pretty reliably just the same.It's not a feature of the GRE radio's, for some reason here in Phoenix when a unit presses the emergency button a radio ID of 0 comes across so I set my 197 and 106 to alert with the radio ID of 0.
That's where the GRE has a slight advantage, you can program it to say whatever you want like: "EMERGENCY CALL!" is what I have in mine.You won't get the same display like on an XTS5k or XTS2500. It won't say emergency received or EMR:radio ID when an emergency button is pushed.
Tagging a Radio ID of 0 works for Phoenix and the Mesa/AJ/Gilbert part of the RWC I'm not sure if this works for Tempe though or the west valley agencies.On a P25 system, I do not see “Emergency Alert” under Sys Option. I do see it for a MOT system and EDACS systems. How do I configure Emergency Alert for a P25 system?