means for retrieving a station number from the queues, including means for sensing {HEAD ~ the end} of {TAIL ~ a message packet} supplied to the star coupler, and in response issuing a queue advance signal to retrieve an item from the queues 
of
means for retrieving a station number from the queues , including means for sensing { HEAD ~ the end } of { TAIL ~ a message packet } supplied to the star coupler , and in response issuing a queue advance signal to retrieve an item from the queues
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH