Motorola TETRA MTM5400 User Manual

3.1.8
Assistance Call
This feature allows you to make private calls to ask for assistance in normal and noncritical situations.
To initiate an assistance call, you can select the target address from up to five configured numbers.
NOTE: Your service provider can configure the number, priority, and the type of the call
(simplex or duplex).
You can start an Assistance Call using one of the following methods:
• Dial a predefined number and press Send key.
• Menu
→Services→Assistance Call
3.1.9
Call Modification
Call Modification is a feature that allows your service provider to modify the call to optimize it and
adjust to a current situation.
Modification can cover:
Call priority
Modified during call setup.
Call type
Modified during call setup.
Call encryption
Modified during an ongoing call, but not in the transmission phase.
When the call is modified, your radio displays Call Modified message.
When a recently modified call requires the PTT button to transmit, your radio displays Call
Modified Use PTT.
All modifications are made by your service provider and your radio only follows them. You have no
influence on ongoing call modifications.
When call priority is changed to emergency:
• The display indicates that an Emergency Group Call has been received.
• Your radio plays a special audio alert.
NOTE: If a Group Call is modified into an Emergency Group Call, no emergency-related
features are triggered.
If your radio cannot follow a call modification requested by the service provider, due to its settings, your
radio rejects it and displays Service Not Available message.
3.2
Local Site Trunking
This mode is also called as Fallback Mode and it allows more than one radio from the same site
to communicate when the link between the site and the network central controller fails. Entering and
exiting Local Site Trunking (that is, returning to System Wide Services) is done automatically. In this
mode, some services are unavailable.
NOTE: Your service provider can disable this mode.
68015000180-MR
Chapter
3 :
Modes
48

Motorola TETRA MTM5400 Specifications

General

Operating Temperature	-30°C to +60°C
IP Rating	IP54
Channels	Up to 1000
RF Power Output	10W
Frequency Bands	380-430 MHz, 806-870 MHz