JANOAH, Inc. provides an Asterisk based solution that is a fully featured telephone system including the following features just to name a few:

• PRI & T1 Phone System Integration
  
• SIP & IAX2 Integration (Open VOIP Protocols)
• Voice Mail
  
• Voice Mail to Email Delivery immediately as a WAV file attachment
• Mobile Bridging: When your office phone rings, your mobile phone can ring all at the same time.
• Follow Me Call Routing: An auto attendant records the callers name and then calls you at possibly many different numbers. If you accept the call, the auto attendant bridges the call to your mobile phone (for example). If you don’t accept the call, the auto attendant sends the call to Voice Mail.
• Fax: receive faxes that get converted to PDF files and sent to your email account
• Nice Administrative Web Graphic User Interface (GUI): setup and maintain your VOIP system with a nice web GUI
• Nice User Web GUI: Each user can login via a web browser and check voice mails and adjust how their calls are routed.
• Call Groups: Sales, Service, Accounting can ring simultaneously or assigned one at a time (Round Robin)
• Auto Attendant / Interactive Voice Response (IVR)
• Top of the Line VOIP Telephone Hardware like the Polycom IP 6000 or the Aastra 53i
  
• and much more …