The user processes are configured for execution on {HEAD ~ the processors} for interfacing {TAIL ~ multiple subscriber locations} 
The user processes are configured for execution on { HEAD ~ the processors } for interfacing { TAIL ~ multiple subscriber locations }
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL