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