When {HEAD ~ an instruction} for turning off the power of {TAIL ~ the communication apparatus} is received, the communication apparatus executes the requested communication task while performing the specific operation 
When { HEAD ~ an instruction } for turning off the power of { TAIL ~ the communication apparatus } is received , the communication apparatus executes the requested communication task while performing the specific operation
OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH