Gateway And Repeater Synchronization; Sds Remote Control; Figure 7: Sds Remote Control Overview - Motorola ST7000 Product Information Manual

MN002955A01-AA
Chapter 2: Services and Features
When the radio connects to a gateway, it plays a tone, displays the Gateway available message,
and shows an appropriate icon. When the radio loses connection with the gateway, it plays a tone,
displays the Gateway not available message, and the gateway icon is blinking.
2.16.3

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 calls 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 calls 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.
2.17

SDS Remote Control

Short Data Service (SDS) Remote Control is a paid feature.
The SDS remote control feature enables controlling a radio through Air Interface using SDS - TL
bearer service. A controlling terminal, for instance, a controlling radio or SwMI controlling terminal,
sends the SDS remote control messages with AT commands to a radio for its execution.

Figure 7: SDS Remote Control Overview

C o n tro lle d Radio
The SDS remote control functionality works in both Trunked Mode Operation (TMO) and Direct Mode
Operation (DMO) and the remote control PDUs are sent using Terminal Equipment (TE).
You can use the feature only after a successful authorization, which requires entering a valid remote
control PIN number.
50
T M O
T M O/DMO
Radio T E
C o n tro llin g Terminal
S w M I
C o n tro llin g T erm in al
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