A customer computer connects to an online service provider by {HEAD ~ phone}, Internet, or {TAIL ~ other telecommunications link} 
A customer computer connects to an online service provider by { HEAD ~ phone } , Internet , or { TAIL ~ other telecommunications link }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL