Cannot cancel incoming emergency call on non-display radios
It is not recommended to have non-display radios receive emergency calls (because they cannot display the ID of the emergency caller).
Currently, if set as an emergency receiver, the only way to cancel an incoming emergency alert on a non-display radio is to turn the radio off and on again (we do plan to implement a way of cancelling an incoming emergency alert using a button in a future firmware release).
If, in your system, you have a mix of display and non-display radios and want to receive emergency calls on non-display radios (but not have them ring or flash the LED) we recommend you set up a second emergency system disabling the alarm tone and LED indication as per the screenshot below and then assign EmSys 02 to your non-display radios.