Planning Walk the Site to Measure RSSI levels
ShoreTel IP Phone 930D Planning and Installation Guide 25
The IP930D components function properly when RSSI levels are as follows:
For handsets: -75 dBm or better. (This value appears on the handset as 75 or a lower number; the
minus sign is not displayed on the handset.)
For bases and repeaters: -70 dBm or better. (You can view levels for bases and repeaters from
ShoreTel IP930D Manager after installation.)
Walk the Site to Measure RSSI levels
To get a sense of the average coverage range of the site, start with the base in a central location and
walk the site (including the floors above and below the base station, if applicable) to measure RSSI
levels from the base. Whenever construction materials vary significantly in one area of the site, move
the base and measure again in that area. Record the results on the floor plan.
If you know the location where you are likely to install the base, measure the coverage range from this
location, as well (for example, in the area where most handset users spent the most talk time).
Wherever the handset RSSI level reads higher than 75 dBm, you have moved out of performance
range. In this case, you might need to add one or more repeaters to achieve adequate coverage for
the site. Record these locations on the floor plan.
Identify Repeater Locations (if applicable)
Follow these steps:
1. On the floor plan, note the edge of the base station signal range (where the handset RSSI value
reads higher than 75 dBM). You can assume that you will need to install a repeater at this location.
2. Move the base to a location near this reference point and measure the handset range from the
new location.
3. Repeat if needed, recording repeater locations and RSSI levels on the floor plan.
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