Asterisk™ v1.4.2 - The Open Source Linux PBX

Posted on Friday, March 23, 2007 @ 23:02:41 EDT by meshal

Asterisk is a complete PBX in software. It runs on Linux and provides all of the features you would expect from a PBX and more. Asterisk does voice over IP in three protocols, and can interoperate with almost all standards-based telephony equipment using relatively inexpensive hardware.

Asterisk provides Voicemail services with Directory, Call Conferencing, Interactive Voice Response, Call Queuing. It has support for three-way calling, caller ID services, ADSI, SIP and H.323 (as both client and gateway). Check the Features section for a more complete list.

Asterisk needs no additional hardware for Voice over IP. For interconnection with digital and analog telephony equipment, Asterisk supports a number of hardware devices, most notably all of the hardware manufactured by Asterisk's sponsors, Digium™. Digium has single and quad span T1 and E1 interfaces for interconnection to PRI lines and channel banks as well as a single port FXO card and a one to four-port modular FXS and FXO card.

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.

Call Features
  • ADSI On-Screen Menu System
  • Alarm Receiver
  • Append Message
  • Authentication
  • Automated Attendant
  • Blacklists
  • Blind Transfer
  • Call Detail Records
  • Call Forward on Busy
  • Call Forward on No Answer
  • Call Forward Variable
  • Call Monitoring
  • Call Parking
  • Call Queuing
  • Call Recording
  • Call Retrieval
  • Call Routing (DID & ANI)
  • Call Snooping
  • Call Transfer
  • Call Waiting
  • Caller ID
  • Caller ID Blocking
  • Caller ID on Call Waiting
  • Calling Cards
  • Conference Bridging
  • Database Store / Retrieve
  • Database Integration
  • Dial by Name
  • Direct Inward System Access
  • Distinctive Ring
  • Distributed Universal Number Discovery (DUNDi™)
  • Do Not Disturb
  • E911
  • ENUM
  • Fax Transmit and Receive (3rd Party OSS Package)
  • Flexible Extension Logic
  • Interactive Directory Listing
  • Interactive Voice Response (IVR)
  • Local and Remote Call Agents
  • Macros
  • Music On Hold
    • Flexible Mp3-based System
    • Random or Linear Play
    • Volume Control
  • Predictive Dialer
  • Privacy
  • Open Settlement Protocol (OSP)
  • Overhead Paging
  • Protocol Conversion
  • Remote Call Pickup
  • Remote Office Support
  • Roaming Extensions
  • Route by Caller ID
  • SMS Messaging
  • Spell / Say
  • Streaming Media Access
  • Supervised Transfer
  • Talk Detection
  • Text-to-Speech (via Festival)
  • Three-way Calling
  • Time and Date
  • Transcoding
  • Trunking
  • VoIP Gateways
  • Voicemail
    • Visual Indicator for Message Waiting
    • Stutter Dialtone for Message Waiting
    • Voicemail to email
    • Voicemail Groups
    • Web Voicemail Interface
  • Zapateller
Computer-Telephony Integration
  • AGI (Asterisk Gateway Interface
  • Graphical Call Manager
  • Outbound Call Spooling
  • Predictive Dialer
  • TCP/IP Management Interface
Scalability
  • TDMoE (Time Division Multiplex over Ethernet)
    • Allows direct connection of Asterisk PBX
    • 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
Codecs
  • ADPCM
  • G.711 (A-Law & ?-Law)
  • G.723.1 (pass through)
  • G.726
  • G.729 (through purchase of commercial license through Digium)
  • GSM
  • iLBC
  • Linear
  • LPC-10
  • Speex
Protocols
  • IAX™ (Inter-Asterisk Exchange)
  • H.323
  • SIP (Session Initiation Protocol)
  • MGCP (Media Gateway Control Protocol
  • SCCP (Cisco? Skinny?)
Traditional Telephony Interoperability
  • E&M
  • E&M Wink
  • Feature Group D
  • FXS
  • FXO
  • GR-303
  • Loopstart
  • Groundstart
  • Kewlstart
  • MF and DTMF support
  • Robbed-bit Signaling (RBS) Types
PRI Protocols
  • 4ESS
  • BRI (ISDN4Linux)
  • DMS100
  • EuroISDN
  • Lucent 5E
  • National ISDN2
  • NFAS
Homepage and more info here:
Code:
http://www.asterisk.org/


Download Asterisk™ from here:
Code:
http://ftp.digium.com/pub/asterisk/releases/asterisk-1.4.2.tar.gz


Download Zaptel from here:
Code:
http://ftp.digium.com/pub/zaptel/releases/zaptel-1.4.1.tar.gz


Download Libpri from here:
Code:
http://ftp.digium.com/pub/libpri/releases/libpri-1.4.0.tar.gz


Download Asterisk-Addons from here:
Code:
http://ftp.digium.com/pub/asterisk/releases/asterisk-addons-1.4.0.tar.gz


Download Asterisk-Sounds from here:
Code:
http://ftp.digium.com/pub/asterisk/releases/asterisk-sounds-1.2.1.tar.gz


Download the Asterisk Handbook Project Draft (PDF) from here:
Code:
http://www.digium.com/handbook-draft.pdf


Check ChangeLog here:
Code:
http://ftp.digium.com/pub/telephony/asterisk/ChangeLog-1.4.2

Topic: adv
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