The SIP Center User Agent is software that acts as a 'soft phone', allowing the user to control (IP) telephone calls onscreen. All you need is a soundcard in your PC and you're away! Basic call control functionality is offered via a small graphical user interface that is displayed on the user's desktop.

With this software you can make and take SIP calls using the Internet. A call can be made directly from this user agent to another user agent if there are no intervening firewalls or proxy servers, but more typically your calls (incoming and outgoing) will be routed through external SIP servers.

The SIP Center User Agent can also be used as a test tool. Developers of SIP applications that wish to benchmark their products against a protocol compliant application can use the known parameters of the User Agent to test against.

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When you download this software, you will also need to apply for a license key; this key will be valid for a limited period. Upon expiry, you can simply renew your license key. There will be no charge for the use of this software.

Please note: You need to download and install either SDK1.3 (Java Development Kit) or JRE1.3 (Java Runtime environment) in order to install and run the User Agent software.

How to use it

Comprehensive documentation on basic functionality is included both here and in the download: Installation Guide, together with Release Notes and User Guide describing functionality.

The SIP Center User Agent can also be used to benchmark SIP proxy servers and user agents. To assist the user community in improving product quality we provide full instructions that help users to test their implementations: