User's Manual

User Guide

WherePort III User Guide D948 Rev B

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Figure 23 WherePort in a Doorway

To enter the room, an object must pass through the guaranteed

capture range of the WherePort.

The placement of a WherePort in the doorway might seem simple. Figure 23 shows this

installation. Any tagged asset passing through the doorway must pass through the

guaranteed capture range. However, an object passing down the corridor would also be

pinged by the WherePort. If the WherePort is mounted to the top of the doorway, it

might be below a space on the floor above that is part of the application as well. The

WherePort field might extend far enough into the second floor to ping a WhereTag

moving through a completely separate part of the facility.

The WherePort may need to be mounted inside the room to prevent pinging traffic

along the corridor. Its power level may need to reduced so that the range does not extend

beyond the actual portal. The placement of the tag on the asset may need to be adjusted,

perhaps by placing it closer to top of a vehicle, so that only the portal WherePort will

ping it.

When an area is monitored using portals, all portals must be covered. If a path

into the area is not covered by a WherePort, tagged assets may enter or leave through the

uncovered path.

Corridor

Functional Area