The manager computer is further coupled to {HEAD ~ the number} of uninterruptible power supply systems via {TAIL ~ the computer network} 
The manager computer is further coupled to { HEAD ~ the number } of uninterruptible power supply systems via { TAIL ~ the computer network }
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL