Counterpath X-Lite 4.7 for Mac User Guide Uživatelský manuál stáhnout pdf (Strana 5)

1 Introduction

X-Lite is a softphone from CounterPath that enables you to make VoIP voice and video calls, send and receive

instant messages, share online status (presence) information, and exchange files. X-Lite implements SIP-based

standards for phone calls, IM and presence, allowing you to work with different VoIP service providers. X-Lite

also uses XMPP-based standards for IM and presence.

Standard Telephone Features

The CounterPath X-Lite for Mac softphone has all standard telephone features, including:

• Call display and Message Waiting Indicator (MWI).

• Speakerphone and Mute.

• Redial, Hold, Do Not Disturb.

• Call history – list of received, missed, and dialed calls.

• Auto answer.

• Five-party audio conferencing.

• Three-party video conferencing.

Enhanced Features and Functions

X-Lite also supports the following features and functions:

•Video

• IM and presence using the SIP SIMPLE protocol or the XMPP protocol.

• Contact list containing the individual user’s contacts

• Automatic detection and configuration of audio and video devices.

• Acoustic echo cancellation, automatic gain control, voice activity detection.

• Support for DTMF (RFC 2833 or inband DTMF).

• Support for the following audio codecs:

G.711aLaw, G.711uLaw, G.722, iLBC, OPUS, Speex, Speex Wideband.

• Support for the following video codecs:

H.263, H.263+ 1998.

• Automatic selection of the best codec based on the other party’s capability, the available bandwidth, and

network conditions. X-Lite switches the codec within a call in response to changing network conditions.

• Compliance to 3261 SIP standard.

• Support for these firewall traversal solutions: STUN, TURN, or ICE.

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Counterpath X-Lite 4.7 for Mac User Guide Uživatelský manuál Strana 5