Owner's Manual

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Chapter 4: Network Connectivity
Chapter 4
Network Connectivity
This section describes the network connectivity associated with the Push-to-Talk (PTT) service.
4.1
PTT over 4G LTE Networks
Using PTT over 4G LTE networks ensures the fastest speed, least delay, best voice quality, and
best performance during PTT calls and when using PTT services.
Using PTT over cellular data networks less than 4G may be restricted based on a system-wide
configuration. While the application is restricted, the behavior is the same as having no network
connection, and a "No Connection" message displays. You may be provided an audible and visual
indication of loss of connection to the network based on the application settings. Upon detection of
4G, the application will reconnect to the PTT server and may give an audible indication based on the
application settings. The tones are user-configurable in the application settings.
NOTE: Use of PTT over cellular data networks less than 3G is not recommended because the
slower data rates cause a considerable delay, which can cause a degradation in voice quality
or even dropped calls.
4.2
PTT over Wi-Fi
Using PTT over Wi-Fi can provide effective in-building coverage and leverage Wi-Fi access points
within organizations and hotspots.
NOTE: By default, the PTT application will use Wi-Fi when it is available. To use Wi-Fi for PTT,
turn on the Use Wi-Fi setting in the application. For more details, please refer to the
Settings on
page 147
section.
4.2.1
Switching Between Cellular Data Networks and Wi-Fi
Networks During a Call
Your phone may automatically switch between the cellular data network and a Wi-Fi network,
depending on the availability of a Wi-Fi connection. The switching is known as a “handover” between
networks. If you are on a PTT call when your phone switches between the cellular data network and
a Wi-Fi connection, your PTT call will reconnect automatically after the handover. During a handover,
the PTT application temporarily loses its connection with the server. When this occurs, you
experience a slight loss of call audio. You are notified of this condition by two short tones. The tones
are dependent on the Network Up/Down Tones setting and the Network Loss Tone Repeat setting.
Once the handover is complete and the PTT application reconnects to the data network, your call
automatically continues. The handover may take more than a few seconds. In this case, a call in
progress may not automatically reconnect. If this happens, you can call back from the PTT history.
4.2.2
Authenticated Wi-Fi Connections
The PTT application can be used at any Wi-Fi location, provided your phone has access to the Internet
through that Wi-Fi network. In hotels or other places that provide Wi-Fi access only to patrons, some
authentication, such as a password, may be required to access the Internet, even though the phone