{HEAD ~ The communications network} 16 is preferably {TAIL ~ a conventional telecommunications network} including a plurality of switches and local exchange carriers that carry Internet traffic 
is preferably
{ HEAD ~ The communications network } 16 is preferably { TAIL ~ a conventional telecommunications network } including a plurality of switches and local exchange carriers that carry Internet traffic
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH