The two numbers shown inside brackets and separated by a comma indicate a shelf and a
slot within that shelf.
Thus [1,1] represents SHELF 1, SLOT 1 and [3,11] represents SHELF 3, SLOT 11.
As the user navigates from card to card in configuring the node, the prompt line changes
to reflect the current shelf and slot number.
To navigate from one card to another the S) shelf/slot command is used