General

Online and contextual embedded help, integrated to the administrative Web interface.
Elastix is translated into 20 languages
System resources monitor
Network configurator
The server can be shutdown from the Web
Access control to the Web interface based on the ACL concept
Interface to manage updates
Backup/Restore
Skins support
Server date/time/timezone configurable from the Web

FAX

Fax server based on HylaFax
The fax functionality is administrable via Web
Fax visor integrated. The faxes can be downloaded from the Web in PDF format *
Fax-to-email application
The email template (from fax-to-email) can be customized
Access control for fax clientes (white list)
Can be integrated with the WinprintHylafax plugin. This applications allows to print any document to a virtual fax from a Windows application.

Instant Messaging

Instant Messaging (IM) server based on the Openfire project and integrated with Asterisk. It is based on the Jabber protocol which allows for compatibility with many Jabber clients.
A call can be started from the IM client if you use the Spark client and have installed the Asterisk-IM plugin.
The IM server can be configured from the Web from a friendly interface
Supports groups of IM users
Supports connection with other IM gateways like MSN, Yahoo Messenger, GTalk, ICQ, etc. This allows the user to connect to several networks from the same IM client
Report of user sessions * Support for plugins to extend functionality
LDAP support
Support server-to-server connections to share users between two servers

Email

Email server with multi-domain support
Based in Postfix for high email volume
Administrable via Web
Interface to configure the Relay networks
Web based email client based on the Roundcube project
Support for quotas (the quotas are configurable via Web)

Collaboration

Calendar integrated with the PBX with support for automatic voice notifications. That means that a call is generated when a notification is triggered
Phone Book with click-to-dial capabilities
Two CRM products integrated to the interface (vTigerCRM and SugarCRM)

Extras

A2Billing integrated into the product to manage calling cards
A complete CRM based on the vTigerCRM project
Open Source version of SugarCRM integrated

Call center module

Elastix was the first distribution that included a call center module with a predictive dialer, released enterely as [Free /Libre Software]. This module can be installed from the same web-based Elastix interface through a module loader.

The call center module can handle incoming and outgoing campaigns. Some features are:

Open Source Predictive dialer
Support for Do-Not-Call List
Support for incoming and outgoing campaigns
Forms can be associated to a campaign and designed through an Web wizard
A "script" can be associated to a campaign
Agent console
Support for various types of breaks
Advanced Reports