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