DRAFT
TD 93021US
17 July 2017 / Ver. PF3
128
Installation Guide
teleCARE IP
8.2.1 Location Based - Using LF Beacons
The addition of the NILF low frequency beacons gives location based wireless functionality available
including access control. The NILF will send out its ID, including location information, at regular intervals
using a low frequency 125 kHz signal that will be picked up by the wireless transceiver modules that pass
by the NILF.
Figure 169. Location based wireless functionality
The range of an LF beacon is adjustable and can be up to approximately 8.86 feet (2.7 meters).
When a wireless device comes within range of a passive NILF location beacon it will receive the beacon ID
with the location information. It then stores the location as the last known location. The stored last
known location will be added to the next event that is transmitted from the wireless device, like a button
press, battery low alarm, etc.
When a mobile wireless device comes within range of an active NILF location beacon, it sends a location
update message to the wireless server. In addition, based on the received location information, the
wireless server can check to see if the person carrying the wireless device is allowed to access that
location. Doors can be opened or stay closed depending on the access rights. Automatic alarms can be
generated when a person leaves or enters a certain location.
Whenever a call is made from a mobile wireless device, the location will be transmitted to the wireless
server. When the wireless device is not in range of an LF beacon the last two known locations will be
transmitted.