2.
Formal communication unit
3.
Signal transmission method
5.
Emergency communication
7.
Operational communication
8.
Organized communication groups
9.
Standardized message format
10.
Message sender details
12.
Communication group protocol
13.
Structured communication method
14.
Digital message transmission
15.
Urgent communication mode
16.
Contact information list
17.
Message routing specialist
18.
Communication technician
19.
Digital messaging system
20.
Communication procedure
21.
Message transmission order
22.
Message distribution method
23.
Geographic communication unit
25.
Communication coordination