Counterpath X-Lite 4 for Windows User Guide Uživatelský manuál stáhnout pdf (Strana 5)

1 Introduction

Standard Telephone Features

The CounterPath X-Lite 4 for Windows softphone has all standard telephone features, including:

• Call display and Message Waiting Indicator (MWI).

• Speakerphone and Mute.

• Redial, Hold.

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

Enhanced Features and Functions

X-Lite for Windows also supports the following features and functions:

•Video

• IM and presence using the SIMPLE protocol.

• Managed contact list.

• Automatic detection and configuration of audio and video devices.

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

• Support for the following audio codecs:

Broadvoice-32, Broadvoice-32 FEC, DVI4, DVI4 Wideband, G.711aLaw, G.711uLaw, GSM, iLBC, L16

PCM Wideband, Speex, Speex FEC, Speex Wideband, Speex Wideband FEC.

• 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.

• STUN and ICE NAT traversal.

• Support for DTMF (RFC 2833, inband DTMF or SIP INFO messages).

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Counterpath X-Lite 4 for Windows User Guide Uživatelský manuál Strana 5