CounterPath X-Lite 3.0 User Guide - Manual (Page 38)

CounterPath X-Lite 3.0
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Options – Advanced – Audio Codecs
This pane shows all the codecs that are available with X-Lite. Users can enable or disable codecs as desired.
With only one codec enabled, all calls made will use that codec. With more than one codec enabled, X-Lite will
choose the best codec to use based on the remote party’s capability, the available bandwidth, and current
network conditions.
Users cannot change the properties of any audio codecs.
About Codecs
Audio codecs describe the format by which audio streams are compressed for transmission over networks.
Codecs can be categorized as either narrowband or wideband:
• Narrowband codecs work with low bandwidth connections such as a dialup. These codecs have a
sampling rate of 8 KHz.
• Wideband codecs work with high bandwidth connections and provide superior audio quality (but do not
work with PSTN networks). These codecs have a sampling rate of 16 KHz.