Motorola MTP850 Ex Product Information Manual page 89

Supplementary Services
The terminal will allow the user to perform all actions that can be performed by the terminal without
releasing the SS-AL call. This includes access of most menu items, changing modes, activating and
deactivating scan lists and changing talkgroups. When the user changes talkgroups, the terminal will
appear as if it is performing an attachment and appear that the attachment has succeeded, but the
actual attachment signalling will be performed only after the SS-AL call terminates. When
performing the attachment after the call, no indication will be shown to the user unless the
attachment fails.
15.1.10 Pseudo Power-Down
If the user attempts to power down the terminal, the terminal will appear to power down, but remain
fully operational from layer 3 and below. The terminal will show the user a blank screen, and all
LEDs will be extinguished.
When the SS-AL call ends in this Pseudo power-down state, the terminal will power down.
If the user attempts to power up the radio from the Pseudo power-down state, the terminal will
behave to the user as if it is really powering up.
15.2 Pre-emptive Priority Call (PPC)
If during a call, a call setup is received for a call that has a higher priority than the present call, and
the call priority of the new call is "Pre-emptive Priority 3" (value 14 in the codeplug) or "Pre-emptive
Priority 4 (Emergency)" (value 15 in the codeplug) the terminal will disconnect from the present call
and join the new high priority call.
If the call priority of the new call is "Pre-emptive Priority 1" (value 12 in the codeplug) or "Pre-
emptive Priority 2" (value 13 in the codeplug), the terminal will either accept or reject the new call,
based on a provisioned setting.
When the new call is accepted, a special tone will be sounded to the user, and the user will be given
an indication that this is a high priority call.
If the terminal is provisioned to be able to initiate a pre-emptive priority call, and the user initiates a
private call or phone call to another party and receives a rejection with the reason 'called party
busy', the terminal will provide the user with an option to initiate a new call but this time with pre-
emptive priority. If the user initiates a new call it will be identical to the previous call setup, with the
exception that the call priority be a high priority. The exact priority value that will be sent will be
provisioned.
15.3 RF Sensitive Area Mode (Transmit Inhibit Mode TXI)
RF Sensitive Area Mode, also known as Transmit Inhibit (TXI) Mode, is a mode the terminal can
enter where no radio transmissions will be sent by the terminal.
The RF SA mode is activated by the terminal user in RF sensitive areas, for example hospitals,
airplanes, and so forth, where safety can be jeopardized due to terminal uplink radiation. Once in RF
SA mode, the radio will not transmit under any circumstances, which means no call setup initiation,
no linearization, and so forth will be possible.
RF SA mode is deactivated explicitly by the user, or is implicitly deactivated when the user initiates
an for Emergency call.
The user enters TXI mode and exits TXI mode via a menu sequence or one-touch button.
Upon entry into or exit from TXI mode, if the terminal is camped on a cell, it will send a specially
designated SDS Status message to indicate to the SwMI that it is entering or exiting TXI mode.
March 2009 Chapter 2 - MTP850 Ex/MTP810 Ex Product Information Manual
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