ASCOM d83 Manual page 35

CONFIGURATION MANUAL
Ascom d83 DECT Handset
• BLE beacons normally do not transmit the location data all the time, and the interval between transmis-
sions is usually a configuration parameter in the beacon itself. Note that the longer intervals between
transmissions increase the beacon battery life time, but the accuracy of beacon detection can degrade.
• To decrease the risk of not detecting a beacon, it is recommended to set up BLE scan duration time in
the handset at least five times longer than beacons transmission period time. It is also recommended to
set the BLE idle duration time in the handset to 0. For details refer to the Function Description, Ascom
BLE Location System, TD 93492EN.
• Depending on how precise the location shall be, the BLE beacon transmission (Tx) power might need to
be adjusted. The lower the Tx power value, the smaller the beacon cell size will be and hence the more
precise information can be obtained about the actual handset location.
• BLE beacons regularly transmit data containing proximity UUID which uniquely identifies the group of the
beacons. By default, beacons with UUID set to "d87b32bd-cc0e-437a-81b3-383833bc5ff8" (Ascom
UUID) will be detected by d83 handsets when BLE UUID type is set to Ascom. If your installation is using
another UUID, the parameter BLE UUID type should be set to Custom and the parameter BLE UUID
filter in the WinPDM/Device Manager needs to be set accordingly.
• For a more accurate location detection in the installations with relatively small cell sizes, it is
recommended to set the value for BLE idle duration parameter not more than 1 second.
More frequent scanning will drain the battery quickly.
BLE Beacon Scan
When BLE beacon scan is performed, the four latest detected BLE beacon locators are displayed on the
handset as shown in Figure 4. BLE Location Information, page
counter (lc) define how many scan rounds have been made since the beacon has been detected and lost.
Each scan round is formed as a combination of idle and scan duration values. For example, if BLE idle
duration is set to 1s and BLE scan duration is set to 1s, then your scan cycle will be once every two seconds.
When you are in the zone and the beacon is detected, the detect counter (dc) will continue to increment. If
you have left the zone and no new beacon has been detected, the detect counter (dc) will pause while the
loss counter (lc) will increment. As far as you get back to the zone and the same beacon is detected, the
loss counter (lc) will pause while the detect counter (dc) will continue to increment.
If you have left the zone and a new beacon has been detected, both the detect counter (dc) and loss
counter (lc) will be first set to zero and then the detect counter (dc) will start to increment.
In the Admin menu of the handset, select Location info → BLE location info.
TD 93426EN / 28 January 2022 / Ver. C
30. In addition, detect counter (dc) and loss
Handset Configuration
29