24 Planning and Installation Guide ShoreTel IP Phone 930D
Planning Position and Power up the Base
Position and Power up the Base
For this procedure you will need a PoE mid-span power brick connected to a small Ethernet switch or
hub. This equipment serves to power the base during the site survey and satisfies the base’s need to
detect an Ethernet connection. The small Ethernet switch or hub does not need to be connected
to a live network.
You might want to bring push pins to the site to temporarily mount the base station that you want to
connect onto the wall.
1. Temporarily secure the base on a wall. Choose a location that is:
Near the center of the site
On a central floor (for multi-story buildings)
Near the ceiling (at least 2 meters above floor level)
2. Connect the base to the mid-span power brick and Ethernet.
Display Signal Strength on the Handset
After powering up the base, you can display the RSSI (Received Signal Strength Indicator) level on the
handset to measure the coverage range from the base to the handset.
Follow the steps below.
1. On a deregistered handset, press the Menu button. (If you are using a handset that is registered to
a base, press and hold the Menu button for 2 - 3 seconds.)
The Settings Menu displays.
2. Enter *47*.
3. Highlight the matching MAC address of the base station that you are using for the site survey and
choose Select.
The handset displays the RSSI level. For the site survey, aim to achieve a value on the handset
that displays as 75 dBm or lower.
Understanding RSSI Levels
The dBm value is a measurement that the system uses to report RSSI levels and is usually
represented as a negative value. Therefore, a -40dBm signal is stronger than a -60 dBm signal.
The handset does not display the minus sign for the dBm value. Nonetheless, the smaller the dBm
number on the handset, the stronger the signal.
For example, here is how the handset displays an RSSI of -49dBm.
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