deriving one or more characteristics of {HEAD ~ a source voice transmission} from {TAIL ~ a first communication device} in an originating network 
deriving one or more characteristics of { HEAD ~ a source voice transmission } from { TAIL ~ a first communication device } in an originating network
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH