Set up mass device endpoints (targets)
To create a speaker pole, zone, or an all-poles user, an operator should perform the normal Mass Device Endpoint creation flow. User should give the endpoint a functionally descriptive name, so that it is recognizable in End User Manager and Report Windows as a mass-communication device target entity.
An operator must target either a single GV Group(Zone) or multiple GV Tower(Poles) in the alert. Otherwise, the publishing to LRAD Giant Voice can fail and user may get some unexpected error.