The radio can display the location information directly on the screen or send it over-the-air to your
dispatcher to display it in the control center. Check your radio configuration details with your service
provider.
IMPORTANT:
Where the signals from satellites are not available, the GPS Location Service
does not work. This situation usually happens when your radio cannot establish a view of a
wide area of open sky, for example, when your GPS antenna is covered or facing the ground.
Such situations include being:
• In underground locations
• Inside buildings, trains, or other covered vehicles
• Under any other metal or concrete roof or structure
• Near a powerful radio or television tower
• In extreme temperature outside the operating limits of your radio
Even if your location information can be calculated in such situations, it may take longer to
do so. Therefore, in any emergency situation, always report your location to your dispatcher.
Where adequate signals from multiple satellites are available, your GPS Location Service
feature provides a location, most probably near to your actual location.
The radio can be triggered to send Location Reports in various circumstances, for example:
• Upon a request
• Entering Emergency Mode
• At specified time intervals
• At specified distance intervals
The Location Reports are sent using Short Data Service (SDS).
If the Location Reports are sent using SDS with User-Defined Data Type-4 as a Transport Layer
(SDS - TL), either the European Telecommunications Standards Institute (ETSI) Location Information
Protocol (LIP) or Motorola Solutions Location Request/Response Protocol (LRRP) GPS Location
Protocol is used. The LRRP GPS protocol either use SDS - TL (for added reliability) or Simple GPS
with no SDS - TL (for saving air interface resources). GPS Protocol Identifiers are:
• LRRP SDS TL = 131
• LRRP Simple GPS = 3
• LIP GPS = 10
Location reports are sent in TMO. Your service provider can also provision location reports to be sent
in Direct Mode Operation (DMO). If the radio is provisioned to provide user indications, the feature
operational status is indicated on the radio display. Also, if configured by service provider, the radio
gives an audio-visual notification upon reception of LIP command.
Depending on the radio configuration, viewing the radio position and the status of the visible satellites
is available. The position may consist of longitude and latitude, UK, or Irish grid coordinates.
The GPS Location Service feature can be enabled or disabled as a whole using the Customer
Programming Software (CPS). It is possible to configure the feature parameters using the CPS, or
over the air. The CPS configuration provides a default profile. The commands received over the air
may overwrite the default profile configuration. The profile assigned to the radio determines when to
send location data, what data to send with what accuracy and to what address. All data requests
and configuration commands received over the air are checked to confirm that they have come from
MN003465A01-AF
Chapter 2 : Services and Features
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