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