Features:

• IP PBX system with high-end features comparable to traditional large business voice services
• Up to sixteen (16) SIP compatible IP Phones per SPA9000 system
• Powerful self-configuration capabilities enabled with Linksys IP Phones
• Works with most Internet Telephone Service Providers
  

Details:

• SIP Application Server, Proxy, Registrar and Location Server (RFC3261)
• Multiple Service Provider Lines / SIP Account Support (4)
• Shared Line Appearance (SLA)
• Automated Attendant (AA)
• Configurable AA Answer Delay
• Interactive Voice Response (IVR)
• Recordable IVR Prompts
• Automatic Call Distribution (ACD)
• Configurable Call Routing
  - Least Cost Routing
  - Multiple DID Numbers Per VoIP Line
  - Call Routing to Multiple Extensions or Targeted User
  - Call Hunting - Sequential, Round Robin, Random
• Phone Configuration and Management Server
  - Discovery and Configuration of IP Phones
  - Assignment of Extension
  - Assignment of Dial plan
  - Proxy Logging of SIP Messages
  - Phone Firmware Upgrade Management
• Corporate Directory with Automatic Update
• Configuration and Maintenance via Web Interface (Local or Remote
  - Status Display of All Connections
• Remote Configuration via
  - HTTPS with XML Formatted Files
  - HTTP or TFTP with 256-Bit Encrypted Binary Files
• Call Park - User Definable Parking Space Number
• Call Unpark
• Call Transfer
• Call Forward
• Group Paging
• Intercom
• Directed Call Pick Up
• Group Call Pick Up
• Music / Information via Streaming Audio Server (SAS) for Calls:
  - On Hold
  - Parked in the Parking Lot
  - Being Transferred
• Simultaneous Ringing (Find Me Service)
• Do Not Disturb
• Voice Mail Integration - Service Provider Based
  - Voice Mail Notification via SUBSCRIBE / NOTIFY
  - Forward Call Directly to Voice mail
• Integrated Media Proxy or Direct RTP Routing to ITSP
• Differentiated Services (DiffServ) / Type of Service (TOS) Support
• Two FXS Ports for Phones, Fax machines, Media Adapters
• Voice encoding according to G.711 (64kbit/s)
• Fax Support using G.711 Pass-Through or T.38
• Echo Cancellation (G.165)