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