Nortel Networks Video Gaming Accessories 553-3001-211 Manual De Usuario

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 Option settings
Circuit card grid
Some circuit cards contain option switches or jumpers, or both, that define 
specific functions. A switch or jumper can be identified by an alphanumeric 
coordinate (such as D29) that indicates a location on the card, or by a switch 
number (such as SW2) printed on the circuit board (see Figure 17). Positions 
on a switch (for example, positions 1, 2, 3, and 4 on SW2) are labeled on the 
switch block. 
On a circuit card:
ON may be indicated by the word “on,” the word “up,” the word 
“closed,” the number “1,” an arrow pointing up, or a solid dot (•).
OFF may be indicated by the word “down,” the word “open,” the number 
“0,” or an arrow pointing down.