System Description

TD 93025US
9 May 2019 / Ver. I 74
System Description
teleCARE IP
9.7.2 telecare IP Wireless with Positioning
The following example shows the same area as in the previous example, covered by base
stations and in addition there are 10 passive location beacons (NILF) installed.
The NILF intermittently transmits an LF location update message (NILF ID) which is received
by the wireless devices (NITX and NIFX) that come in range of the LF field. The wireless
devices store the location update message of the last detected NILF until it receives a
location update of another NILF.
When a call is made from a wireless device the location of the last detected NILF is
transmitted together with the identity of the wireless device. The last known location
determines where the call will be linked to, resulting in flashing patterns shown on the
dome lamp or room controller lamp at that location.
Figure 69. teleCARE wireless with positioning