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