ZOIPER Free Version 2.0 is a new generation SIP and IAX softphone compatible with the Asterisk platform as any other SIP or IAX capable system. ZOIPER Free Edition features include:

* SIP + IAX/IAX 2 protocols
* STUN support
* STUN server per account
* Echo cancellation
* DTMF tones sending
* Support for multiple audio devices
* Automatic user registration
* Call transfer
* Hold function
* Codecs: GSM, ulaw, alaw, speex, ilbc
* Adaptive Jitter Buffer
* Call history
* Address book
* Quick dial panel
* Optional Automatic pop-up window for incoming call
* Always on top
* Call logs
* Voice mail message information
* Account password encryption
* Upgrade notification
* Adjustment of audio device
* Codecs priority
* Portable storage compatibility
* Multilanguage support

ZOIPER can also be re-branded. You can choose one of the three types of re-branding:

* Basic: colours, name and logo to your choice;

* Re-branding with...