CounterPath Bria iPhone Edition 3.0 User Guide - Manual (Page 60)

CounterPath Corporation
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5.3 Advanced Settings
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If you make changes to the fields identified by a , you must tap the Apply Changes button at the
bottom of the screen or restart Bria.
Field Description
Network Traversal Strategy Tap to display the choices; see below.
Use VPN If Active If you are using Bria with a VPN connection to your network, set this field to ON, to
force Bria to select the VPN network interface.
If you are not using a VPN, set to OFF (default).
Only set this field to ON if you are using a VPN connection, otherwise the wrong
network interface may be selected, resulting in registration problems.
Voice Activity Detection • ON: audio is not transmitted when no one is speaking. Turning this feature on may
reduce bandwidth usage.
• OFF (default): audio is transmitted when no one is speaking.
Noise Reduction Tx Noise Reduction. When ON, Bria attempts to reduce background noise on audio you are
transmitting (sending to the other person). Not used on iPhone 4 and 4S. The default is
OFF.
Noise Reduction Rx Noise Reduction. When ON, Bria attempts to reduce background noise on audio you are
receiving from the other person. The default is OFF.
Quality of Service If desired, ask your VoIP service provider if QoS is supported. QoS (Quality of Service)
can allow your phone calls to be given a higher priority on the network. The default is
OFF.
Codecs Variable Bitrate This setting applies when the negotiated codec is AMR-WB, SILK, Opus or H.264 (for
video call).
When this setting is turned on, Bria dynamically adjusts the bitrate throughout the call,
based on the current network conditions. For example, when Bria detects many packets
are lost, it tries to lower the bitrate (within the range of a bitrate supported by a specific
codec), in order to ensure the best possible quality under the circumstance.
We recommend that you leave this setting ON, especially when AMR-WB, SILK, Opus
or H.264 is enabled.
If you notice degradation in audio or video quality when your data connection is stable,
you can turn this setting off to see if it makes a difference.