User Guide

Voice call type Description
Broadcast
A special type of group call, which is received by all
terminals in the system (system-wide broadcast call) or
by a specific group. The originator of a Broadcast call is
usually a dispatcher. The receiving members cannot talk.
Quick Call
A special individual call configured on a soft key to
request help or information from a pre-configured
individual or talkgroup destination in a non-emergency
situation. Quick calls can also send status and position
reports. They can have a call priority that is different
from the calls normally set up using the PTT or the
Select/Send key.
Smart Call
A special individual call made in Smart Call mode which
allows you to make group or broadcast calls to specific
talkgroups without the need to notify the network about
the talkgroup change. Smart Call mode is initiated from a
configured soft key.
Smart call priority can have a call priority value from 0
(undefined) to 15 (pre-emptive priority 4, emergency) in
TMO and to a value from 0 (undefined) to 3 (Emergency
pre-emptive priority call) in DMO.
Alarm Call
The Alarm Call has the highest call priority in TETRA.
Usually initiated by pressing the Emergency Button.
Alerts all other radio users on the talkgroup of the
emergency situation.
Data call types
Data call type Description
Individual full-duplex
Circuit Mode Data
Circuit Mode data calls have a very short transit delay
and so are suitable real-time services
Status Message
A Status message may have 65536 possible status values.
Of these, value 0 is defined to mean ‘Emergency,’ values
1–32767 are reserved, and values 32768–65535 are available
for network or user-specific definition.
SDS Message
A user-defined message that can be sent by individuals
and received by individuals and talkgroups.
Packet Data
TETRA Packet Data extends TETRA to act as an IP
subnet. This enables application programmers to build
their applications in a well-standardised environment.
Call History
The Call History records up to 20 recent individual calls. It can be customised
to display Incoming Calls or Outgoing Calls or both sets of call types in a list.
User Guide
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