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Asterisk™ Features

Asterisk™ based telephony solutions offer a rich and flexible feature set. Asterisk™ offers both classical PBX functionality and advanced features, and interoperates with traditional standards-based telephony systems and Voice over IP systems. Asterisk™ offers the features one would expect of a large proprietary PBX system such as Voicemail, Conference Bridging, Call Queuing, and Call Detail Records.

Telephony Services:

  • Voicemail System
    • Password Protected
    • Separate Away and Unavailable Messages
    • Default or Custom Messages
    • Multiple Mail Folders
    • Web Interface for Voicemail Checking
    • E-mail notification of Voicemail
    • Voicemail Forwarding
    • Visual Message Waiting Indicator
    • Message Waiting Stutter Dialtone
  • Auto Attendant
  • Interactive Voice Response
  • Overhead Paging
  • Flexible Extension Logic
    • Multiple Line Extensions
    • Multi-Layered Access Control
    • Direct Inward System Access
  • Directory Listing
  • Conference Bridging
    • Unlimited Conference Rooms
    • Access Control
  • Call Queuing
  • ADSI Menu System
    • Support for Advanced Telephony Features
    • PBX Driven Visual Menu Systems
    • Visual Notification of Voicemail
  • Call Detail Records
  • Local Call Agents
  • Remote Call Agents
  • Protocol Bridging
    • Provides seamless integration of technologies
    • Offers a unified set of services to users regardless of connection type
    • Allows interoperability of VoIP systems

Call Features:

  • Music on Hold
  • Music on Transfer
    • Flexible mp3 based system
    • Volume Control
    • Random Play
    • Linear Play
  • Call Waiting
  • Remote Call Pickup
  • Do Not Disturb
  • Caller ID
  • Caller ID Blocking
  • Caller ID on Call Waiting
  • Call Forward on Busy
  • Call Forward on No Answer
  • Call Forward Variable
  • Call Transfer
  • Call Parking
  • Call Retrieval

Scalability:

  • TDMoE
    • Allows Direct Connection of Asterisk PBX
    • Offers Zero Latency
    • Uses Commodity Ethernet Hardware
  • Voice over IP
    • Allows for Integration of Physically Separate Installations
    • Uses commonly deployed data connections
    • Allows a unified dialplan across multiple offices

Voice over IP Interoperability:

Asterisk™ provides transparent bridging between Voice over IP protocols and traditional telephony equipment. In addition, Asterisk can transfer calls from one system to another via the Inter-Asterisk™ eXchange (IAX™) protocol.

  • Inter-Asterisk™ eXchange (IAX™)
  • H.323
  • Session Initiation Protocol (SIP)
  • Media Gateway Control Protocol (MGCP)

Traditional Telephony Interoperability:

  • Robbed Bit Signaling Types
    • FXS and FXO
    • Loopstart
    • Groundstart
    • Kewlstart
    • E&M
    • E&M Wink
    • Feature Group D
  • PRI Protocols
    • 4ESS
    • Lucent 5E
    • DMS100
    • National ISDN2
    • EuroISDN
    • BRI (ISDN4Linux)

Codec Support:

  • GSM
  • G.729 (available through purchase of commercial license(s))
  • G.723.1 (pass through)
  • Linear
  • Mu-Law
  • A-Law
  • ADPCM
  • G.726
  • ILBC
  • LPC-10
  • MP3 (decode only)

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