User Guide
163
a private call to an individual.
privacy screen
A customisable option so that if the screen is inactive for a
period of time the display will be replaced with a
customisable picture in order to protect the privacy of any
displayed information. This is particularly useful for
radios worn at shoulder level. The privacy screen will be
replaced by the normal display if any activity occurs
which turns on the backlight.
PSTN
Public Switched Telephone Network. sf. (T)
PTT button
The button, usually on the side of the radio, pressed to
initiate a group call. The button is released to listen to any
response from other radio users.
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. (S)
repeater
A device that is installed at a fixed location and whose
sole purpose is to receive a signal and then retransmit the
same signal at a higher strength. Repeaters are used by
institutions such as police departments and hospitals to
transmit signals over a longer distance than the two-way
radio was previously capable of. Installing a repeater
commonly used to eliminate a dead spot in a building or
town.
screen saver
An animation or image which replaces an unchanging
computer display after a period of inactivity.
SDS
Short data services (SDS) are TETRA transport services
for the transmission of data. Messages can be sent and
received by TETRA radios, dispatchers, and external
applications. The parties are identified by 24-bit integer
Short Subscriber Identities (see "S"). sf.
short data services (SDS)
Text messages that can be sent or received on a TETRA
radio.
soft key
A programmable key on a PowerTrunk radio that can be
customised as a shortcut to a function, for example a
context key on the radio that can be customised as a
shortcut to the Contacts list. On some radios, the
Select/Send key and the Cancel/Home key, along with all
12 keys of the radio keypad (1 – 9, *, 0, #,), left- and right-
context keys, and the Emergency Key are programmable
soft keys. (S)
Smart Call
On PowerTrunk radios, a Smart Call is a call to an
address other than the selected talkgroup. (S)
status message
Words or concise phrases selected from a pre-determined
list that is resident in the terminal, which are transmitted
as a simple code reference, and then de-coded by the
receiving device and displayed as the word message, e.g.
"At the scene".
talkgroup
A pre-defined group of users on one frequency band. (T)
telephone call
Use this term when referring to the user making a
telephone type call, where the user holds the radio similar
to that when holding a telephone handset or mobile
phone. Do not use the term full duplex call in user
documents. See also private telephone call, and group
call.
Transmit Inhibit mode
An operational mode for use in RF sensitive areas, that
allows the radio to continue operating without
transmitting. When Transmit Inhibit is activated and
deactivated, a status message is sent confirming the
operational state of the terminal.
Trunked Mode Operation (TMO)
Radios operating over the TETRA network.
tri-colour LED
An LED with three colours that is used on a PowerTrunk
radio and mobile transceiver to alert the user to a change
of state such as the radio operating in transmit inhibit
mode. Sometimes called the Status Indicator. (S)
UDSL
User Defined Scan List. sf.