{HEAD ~ The controller} is transparent to {TAIL ~ incoming calls} and local outgoing calls, as well as certain excepted calls which commence with the digit 1 
{ HEAD ~ The controller } is transparent to { TAIL ~ incoming calls } and local outgoing calls , as well as certain excepted calls which commence with the digit 1
HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH