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86 CHAPTER 5: PLANNING THE 3COM MOBILITY SYSTEM
Adjusting the Origin
Point
3WXM uses a building’s origin point to understand what is above or below
a given floor. When calculating RF coverage, 3WXM needs to understand
where MAP access points on adjacent floors are located so that 3WXM can
take RF from those MAPs into account when assigning channels.
If an imported drawing has an origin point defined, 3WXM tries to use
that origin point. Otherwise, 3WXM places the origin point in the upper
left corner of the drawing by default.
You are not required to use the upper left corner of the building as the
origin point. You can select an easily identifiable feature on all floors,
such as an elevator shaft. Or, to include additional features that are not
on the floor itself, you can extend the drawing beyond the exterior walls
by moving the origin farther up and left.
To adjust the origin point
1 Access the floor plan in the Edit Content page.
2 Drag and drop (the crosshairs icon) to the new location.
The following example shows a floor plan with an origin point in the
upper left corner of the drawing.
Origin point