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MN004527A01-AG
Chapter 2: Services and Features
If DGNA user notification is provisioned, the user is notified once the DGNA operation is successful.
For example, when a group is added or deleted. The notification is displayed until you confirm the
operation. In case you receive a call, the message continues displaying until you confirm it.
The radio supports the reception of a DGNA Assignment that is addressed to its selected talkgroup as
a supergroup of the selected group. All signaling addressed to the supergroup is monitored in addition
to signaling addressed to the selected group, any announcement or associated groups, and groups in
the active scan lists.
When the selected group is unselected, the radio ceases processing signaling to the supergroup that
was associated with that selected group.
The radio receives the lifetime of the supergroup as part of the assignment signaling. If a subsequent
assignment to the same group is not received within that lifetime, the radio ceases monitoring that
supergroup.
The radio also supports supergroups of scanned groups, such that a group addressed DGNA
assignment received on one of the user scan group addresses causes the radio to monitor all signaling
addressed to that supergroup as long as the scan group is being monitored, and as long as the
supergroup lifetime lasts.
The following DGNA functions are not supported:
•
Call-related DGNA.
•
Functionality of the authorized user.
•
Network authentication before accepting DGNA.
2.20.2
Ambience Listening
The Ambience Listening (AL) feature allows a console operator or dispatcher to monitor audio activity
near a specific radio without giving any indication to the affected radio.
When the radio receives a call setup message with an AL call, the radio accepts the call. Then the
radio opens the microphone, and begins transmitting without showing any indication of the call. Call
acceptance and rejection while active in another call follows the PPC rules.
The radio imposes no time limit on the transmission. The radio continues to transmit until the SwMI
ends the call or when you perform an action that releases the call. If you attempt to start a service
while the AL call is in progress, the radio disconnects the call and initiates the requested service. The
radio allows performing actions that can be performed without releasing the AL call. These actions
include access of most menu items, activating, deactivating scan lists, and changing talkgroups. When
changing talkgroups, the radio appears as if it is performing an attachment. The attachment appears to
be successful, but the actual attachment signaling is performed only after the AL call terminates. When
performing the attachment after the call, no indication is shown to the user unless the attachment fails.
If you attempt to power down the radio in the active AL call, the radio enters Pseudo Power-Off state.
2.20.3
Pseudo Power-Off
If you attempt to power down your radio in the active Ambience Listening (AL) call, your radio appears
to turn off. However, it remains fully operational from Layer-3 and below.
Your radio has a blank screen, and all LEDs are turned off. When the AL call ends in this pseudo
power-off state, your radio automatically turns off.
If you attempt to power up your radio from the pseudo power-off state, your radio acts as if it is really
powering up.
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