Gateway And Repeater Synchronization; Transmit Inhibit Mode - Motorola MTP3100 User Manual

68015000897–FC
Chapter 3: Modes
3.3.10

Gateway and Repeater Synchronization

To communicate via gateways or repeaters, the radio requires synchronization with a gateway or a
repeater.
A gateway or a repeater sends presence signals to radios. If a radio receives presence signals, it stays
synchronized with the gateway or the repeater which sends the signals. If a radio fails to receive a
presence signal it does not immediately lose synchronization. The radio waits for another successful
presence for a time defined by your service provider. This function ensures that communications are
not dropped due to temporary reception issues.
If a gateway or a repeater is unavailable or the radio is not synchronized with a gateway or a repeater,
depending on the setup configured by your service provider, the following scenarios apply:
• The radio falls back to Direct Mode Operation (DMO).
• After pressing the PTT button, a prompt appears warning that the second press overrides the
gateway or repeater operation mode.
• No direct DMO communications are permitted.
In the second scenario, while the radio receives individual calls and group calls, and replying to
individual calls is possible, replying to group calls is not possible.
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.
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