Ambience Listening; Pseudo Power-Off; Preemptive Priority Call; Transmit Inhibit Mode - Motorola MTP830 S Product Information Manual

58 | Services and Features
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 functionalities are not supported:
• Call-related DGNA.
• Functionality of the authorized user.
• Network authentication before accepting DGNA.

Ambience Listening

The Ambience Listening (AL) feature allows a console operator or dispatcher to monitor audio activity in the vicinity
of 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
the user performs an action that releases the call. If the user attempts 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 Ambience Listening call, the radio enters Pseudo Power-
Off state.

Pseudo Power-Off

If you attempt to power down the radio in the active Ambience Listening call, the radio appears to turn off. However,
it remains fully operational from Layer–3 and below. The radio has a blank screen, and all LEDs are turned off.
When the AL call ends in this pseudo power-off state, the radio automatically turns off.
If you attempt to power up the radio from the pseudo power-off state, the radio acts as if it is really powering up.

Preemptive Priority Call

If during a call, a call setup is received for a call with higher priority than the present call, and the new call priority is
Preemptive Priority 3 (value 14 in the codeplug) or Preemptive Priority 4 – Emergency (15), the radio disconnects
from the present call and joins the new high priority call.
If the call priority of the new call is Preemptive Priority 1 (12) or Preemptive Priority 2 (13), depending on
configuration the radio either accepts or rejects the new call.
When the new call is accepted, a special tone is played, and you are notified of the high priority call.
When you initiate a private call and you receive a rejection with the reason Called party busy, you have the option to
interrupt the existing call or initiate a new call. However, this time the call is initiated with the preemptive priority.

Transmit Inhibit Mode

The Transmit Inhibit Mode is a mode in which the radio sends no radio transmissions. It is recommended to activate
the mode in RF sensitive areas, for example hospitals, airplanes, where safety can be jeopardized due to transmission
radiation.
To activate, select M
ENU
Send Feedback | |
→ More . . . → Networks → TXI Mode → Activate.