1 introduction, Introduction, 1introduction – CounterPath X-Lite 4 for Mac User Guide User Manual
Page 5: Standard telephone features, Enhanced features and functions
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Introduction
Standard Telephone Features
The CounterPath X-Lite 4 for Mac softphone has all standard telephone features, including:
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Call display and Message Waiting Indicator (MWI).
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Speakerphone and Mute.
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Redial, Hold.
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Call history – list of received, missed, and dialed calls.
Enhanced Features and Functions
X-Lite 4 also supports the following features and functions:
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Video
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IM and presence using the SIMPLE protocol.
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Managed contact list.
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Automatic detection and configuration of audio devices.
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Acoustic echo cancellation, automatic gain control, voice activity detection.
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Support for the following audio codecs:
DVI4, DVI4 Wideband, G.711aLaw, G.711uLaw, GSM, iLBC, L16 PCM Wideband, Speex, Speex FEC,
Speex Wideband, Speex Wideband FEC.
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Support for the following video codecs:
H.263, H.263+ 1998.
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Automatic selection of the best codec based on the other party’s capability, the available bandwidth, and
network conditions. X-Lite 4 switches the codec within a call in response to changing network conditions.
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Compliance to 3261 SIP standard.
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STUN and ICE NAT traversal.
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Support for DTMF (RFC 2833, inband DTMF or SIP INFO messages).