Elastix is a unified communications server software that brings together IP PBX, email, IM, faxing and collaboration functionality.

The Elastix 2.5 functionality is based on open source projects including Asterisk, FreePBX, HylaFAX, Openfire and Postfix.

It enables extensions to make calls via the public switched telephone network (PSTN) or via Voice over Internet Protocol (VoIP) services.

[2] It includes drivers for the major manufacturers like Dinstar, OpenVox, Digium, Khomp, Sangoma Technologies Corporation, Rhino Equipment, Xorcom, and Yealink [zh].

[5] Elastix was created and maintained by PaloSanto Solutions, an Open Source support company based in Ecuador.

It was not until late December 2006 that Elastix was released as a Linux distribution with Asterisk, Zaptel and a number of other packages which were easily administrated via a user friendly Web interface that caught the community's attention.