CounterPath announces the worldwide availability of X-Lite 4.0, an entry-level voice and video softphone for Mac and Windows PCs. One of the world’s most widely used multimedia softphones, X-Lite gives enterprises, government agencies and other professional users a fast, cost-effective way to begin deploying VoIP across their existing laptops and desktops to reduce their communications costs and improve productivity.

Available as a free download, X-Lite 4.0 is based on a year's worth of beta user feedback. It takes many of the popular features from X-Lite 3.0 and adds a completely new user interface that provides the choice of a contact-centric experience, a dialpad-centric experience or a combination of the two.

X-Lite 4.0's other major features include:

• Video and voice calling
• Call history, call display and message waiting indicator
• Call-management tools such as redial, hold, mute and speakerphone
• Managed contacts lists
• IM and presence using the SIMPLE protocol
• Automatic detection and configuration of audio devices
• Acoustic echo cancellation, automatic gain control and voice-activity detection
• A troubleshooting assistant to help users quickly resolve a variety of issues
• Auto-complete list when placing calls
• Support for a wide range of audio codecs to ensure the highest possible call quality
• 100 percent compliance with RFC 3261, the SIP spec that lets endpoints negotiate the types of multimedia services to support during a call
• STUN and ICE NAT traversal to balance ease of use with network security
• Support for dual-tone multi-frequency signaling, RFC 2833, inband DTMF and SIP INFO messages, all to ensure full compatibility with both VoIP and legacy analog phone systems.
• Human Interface Device support

X-Lite 4.0 is available today and can be downloaded for free.