APX 6500 O5 CH
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Trunking System Controls
Trunked Announcement
ADVANCED FEATURES
The announcement capability allows you to make
announcements to the entire user group, as well as monitor
talkgroup calls and other announcements.
Announcement calls are handled in two different ways,
depending on the trunked central controller configuration.
The two types are called ruthless and non-ruthless
preemption.
• 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.
Initiating an Announcement
If your radio has been programmed to allow announcement
calls:
Procedure:
1 If channel is set as the primary mode, turn the Mode Knob
to locate the announcement-group mode.
2 Press the microphone PTT button to initiate the
announcement.
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