The selection of timing masters is based on {HEAD ~ the synchronization signals} received from one or more of the timing servers of the multiple pluralities of timing servers and on {TAIL ~ a relationship} among the unique constants stored in each timing server 
The selection of timing masters is based on { HEAD ~ the synchronization signals } received from one or more of the timing servers of the multiple pluralities of timing servers and on { TAIL ~ a relationship } among the unique constants stored in each timing server
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH