| http://code.google.com/p/virtual-pbx/ 
 Interesting VM images to test out
 
 Features
 Processing incoming / outgoing calls.
 
 Completely isolated environment for different users ( incoming / outgoing routes, dial plan, sip-endpoints, web-interface, cdrs, call-recordings, etc ).
 
 Custom greetings support.
 
 Email/Twitter notifications.
 
 Multiple language voice prompts.
 
 Text To Speech ( TTS ) for multiple languages..
 
 'Simple' or 'Expert' mode for configuration.
 
 Custom music on hold (MOH) for each user.
 
 Multiple language WEB interface with xml/json API support.
 
 Flexible customisation for system voice messages.
 
 Managing voice mail via phone or WEB interface.
 
 User specified time zones support.
 
 Call transfer.
 
 Call pickup.
 
 White / Black lists support for each IVR item.
 
 Journal configuration changes.
 
 Call Detail Record ( CDR ).
 
 XML backup / restore configuration.
 
 Multiple roles within a single account.
 
 Privated / Shared DIDs.
 
 SQL reports.
 
 Management API.
 
 Google Calendar integration.
 
 Support Google Analytics for calls trekking.
 
 Radius accounting.
 
 Background music for Find-Me / Queues.
 
 Asterisk 1.8 ( optional ).
 
 Support for wideband / HD audio codec ( g722 ).
 
 Multiple Themes.
 
 Custom branding.
 
 Recording outgoing calls ( auto / on demand ).
 
 Full DTMF history for each call.
 
 Support presettings for SIP providers.
 
 Support Multi-tenant asterisk with Kamailio as sip registrar server / load balancer.
 
 FMC - Fixed Mobile Convergence / Call transfer without breaking the call.
 
 Google-chart for extended statistics.
 
 WEB logon / logoff for the agents of the queue.
 
 Several types of extensions:
 
 Playback
 VoiceMail
 DialOut with Find-Me feautures.
 Company Directory
 Schedule
 WEB-Request
 Chat-Room ( with IceCast broadcast )
 Fax2Email
 DTMF2Email
 Polling ( Voting )
 DISA
 Podcast2Phone gate
 ACD Queues
 CallBack
 DateTime
 Fax on Demand
 Bulletin board system
 CallBlast ( Predictive Dialer )
 WEB Variables
 Stored DB variables
 Goto If
 Alarm clock ( Telephone Reminder / Wake Up )
 Google Calendar - Shedule
 RoboTEXT with support money, date, time, phonenumber, percent, degree formats
 MP3 Streaming
 Call Parking
 GoogleCalendar - Events: reads events via TTS + confirmation / cancellation of events.
 Paging / Intercom
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