User's Guide

Ruthless Preemption
When a ruthless preemption announcement call is initiated, the requesting radio begins transmitting
immediately. All associated talkgroup calls taking place on other channels are immediately halted,
and the radios are steered to the announcement call.
Transmitting radios continue to transmit until the PTT button is released, and unmute for the
announcement call.
Non-Ruthless Preemption
When a non-ruthless preemption announcement is initiated, the initiating unit receives a telephone-
type busy tone, followed by a callback when all associated talkgroup conversations end.
6.21.9.1
Initiating an Announcement
Prerequisites:Ensure your radio has been programmed to allow announcement calls.
Procedure:
1 If channel is set as the primary mode, turn the MFK to locate the announcement-group mode.
2 Press the PTT button to initiate the announcement.
6.22
Ignition Switch Options
The Ignition Switch Options feature is configured in the Customer Programming Software (CPS) and it
determines the functionality of the radio based on the ignition state of the vehicle.
The available options are:
Blank
This option allows you to turn on/off the radio through the Power button regardless of the current
state of the ignition.
Transmit Inhibit
This option allows you to turn on/off the radio through the Power button regardless of the current
state of the ignition. If the ignition is not present, all transmissions are inhibited. This includes
receiving any trunking dispatch communications as the radio is not affiliated with the trunking
systems.
PTT Transmit Inhibit
This option allows you to turn on/off the radio through the Power button regardless of the current
state of the ignition. If the ignition is not present, all PTT button transmissions are inhibited.
However, the radio is able to affiliate with the trunking systems.
Required
This option allows you to turn on the radio only if ignition is present. The radio turns off either
through a Power button press or when the ignition is lost. If the radio turns off due to ignition being
removed, it automatically turns on when the ignition is present.
If the radio is configured with the Auto Power Off Timer, it automatically turns off after being inactive
for a period (with or without ignition).
Soft Power Off
This option allows you to turn on the radio either through the Power button or when the ignition is
detected. Meanwhile, if the Power button is pressed or the ignition is removed, the radio turns off.
If the radio is configured with the Auto Power Off Timer, it automatically turns off after being inactive
for a period (with or without ignition).
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Chapter 6: Advanced Features
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