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