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.
When starting Emergency Operations, any ongoing voice call is aborted or cleared down, and any
packet data transfer in progress is aborted. However, the session is kept open.
During Emergency Operations, the radio rejects phone, PABX, and private calls, and does not monitor
the talkgroups in the selected scan list.
To terminate Emergency Operations, press the
Right
soft key.
3.5.1
Emergency Alarm
The Emergency Alarm is a special status message. Your radio sends the message in either TMO or
DMO.
Your radio sends the message each time it enters Emergency Operation. An audible tone sounds for a
successfully sent message. To resend the message, press the
Emergency
button.
NOTICE:
During Hot Microphone transmission, your radio is not allowed to resend the
message.
3.5.2
Emergency Group Call
The Emergency Group Call has the highest communication priority and it is a pre-emptive call.
Emergency Group Call is available in both TMO and DMO. During Emergency Operations, start
Emergency Group Call by pressing the
Emergency
button. The radio can also support Hot
Microphone operation, which allows the Emergency Call to be conducted without pressing the
PTT
button.
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Chapter 3: Modes
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