Initiating An Announcement; Ignition Switch Options; Blank; Tx Inhibit - Motorola APX 5500 User Manual

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, at which time they also
unmute for the announcement call. Individual calls (Private Conversation and telephone
interconnect) are not affected.
Non-Ruthless Preemption
When a non-ruthless preemption announcement is initiated, the initiating unit receives a telephone-
type busy tone, followed by a call back when all associated talkgroup conversations end.
Once an announcement call is pending, any attempts by other users to initiate a talkgroup call will
result in a telephone-type busy tone. These users will not receive a call back until the
announcement call is complete.
2.17.8.1

Initiating an Announcement

Prerequisites: Ensure your radio has been programmed to allow announcement calls.
Procedure:
1 Press the Mode Rocker to locate the announcement-group mode.
2 Press the PTT button to initiate the announcement.
2.18

Ignition Switch Options

This feature allows the user to select the functionality of the radio based on the Ignition State of the
radio user's vehicle.
2.18.1

Blank

This option allows the user to power on and power off the radio through the Power button regardless of
the current state of the Ignition.
2.18.2

Tx Inhibit

This option allows the user to power on and power off the radio through the Power button regardless of
the current state of the Ignition. In addition, if the Ignition is not present, then all transmissions are
inhibited. This includes receiving any Trunking dispatch communications since the radio will not affiliate
with the Trunking systems.
2.18.3

PTT Tx Inhibit

This option allows the user to power on and power off the radio through the Power button regardless of
the current state of the Ignition. In addition, if the Ignition is not present, then all PTT button
transmissions are inhibited. However, the radio is able to affiliate with the Trunking systems.
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Advanced Features
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