Transmit Inhibit Mode; Emergency Operations - Motorola MTP8550Ex Feature User Manual

MN002041A01-AH
Chapter 3: Modes
3.4

Transmit Inhibit Mode

The Transmit Inhibit (TXI) Mode is a mode in which the radio sends no radio transmissions. Activate
this mode in RF sensitive areas, for example hospitals, airplanes, where safety can be jeopardized due
to transmission radiation.
To activate, select Menu → Networks → TXI Mode → Activate.
In this mode, the radio does not transmit under any circumstances except for the Emergency Calls. All
the functions and keys which cause transmission, for example registration to the network, changing
talkgroup or folder, sending SDS messages, or pressing the PTT button are disabled. Any transmission
trial causes the radio to display Not Allowed In TXI Mode notification and to play a tone.
Your radio can still receive:
• Group calls
• Messages - stored in the Inbox
• Private call attempts - stored in the Missed Calls list, without the option to respond
When no danger to safety exists anymore, for example, when you leave the RF sensitive area, you can
deactivate the TXI Mode and the radio returns to standard operation.
You can deactivate the mode by selecting Menu → Networks → TXI Mode → Deactivate, pressing
One-Touch Button, or implicitly when initiating an Emergency Call.
NOTICE: RF Transmissions from the radio are prevented under the following conditions:
• TXI Mode is activated.
• Battery is removed.
• The radio is turned off.
On entering or exiting the TXI mode, when the radio is camped on a cell, it sends a specially
designated Short Data Service (SDS) status message. This SDS message indicates to the SwMI that
the radio is entering or exiting TXI mode.
Mobility procedures that do not require the radio to send an uplink transmission are performed except
for cell reselection.
In TXI mode, the radio joins group calls for any group that the radio is monitoring, but the transmitting
on that call is still prohibited.
The radio also displays any incoming SDS messages to the user. The missed call feature is active in
the TXI mode and allows checking what calls were missed. However, the radio attempts to prevent call
setup retransmission from being recorded as separate calls.
If you initiate an emergency call, the radio immediately leaves TXI mode and attempts to start the
emergency call if the radio is in service.
If the radio is turned off in the TXI mode, on turning on, the radio asks whether to exit the TXI mode. If
you choose No, the radio turns off.
3.5

Emergency Operations

Emergency Operations are used in critical situations.
Pressing and holding the Emergency button, or entering the Emergency Number and pressing the
Send key, activates one or more services (depending on your service provider settings).
NOTICE: It is possible to turn on the radio by pressing the Emergency button. Depending on
the service provider settings, the radio can start Emergency Operations automatically. If the
radio is PIN-protected (except for SIM PIN), Emergency Operations bypass the PIN lock.
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