routing the call to {HEAD ~ an internet protocol destination address} based upon {TAIL ~ the internet protocol address} to which the called telephone number was mapped 
routing the call to { HEAD ~ an internet protocol destination address } based upon { TAIL ~ the internet protocol address } to which the called telephone number was mapped
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH