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Asterisk Architecture

Asterisk Architecture. Architecture. APIs. Defined for loadable modules Facilitates hardware and protocol abstraction The Asterisk core does not have to worry about details of how a caller is connecting, what codecs are in use, etc. Channel API.

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Asterisk Architecture

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  1. Asterisk Architecture

  2. Architecture

  3. APIs • Defined for loadable modules • Facilitates hardware and protocol abstraction • The Asterisk core does not have to worry about details of how a caller is connecting, what codecs are in use, etc.

  4. Channel API • Handles the type of connection a caller is arriving on • VoIP connection • ISDN • PRI… • Dynamic modules loaded to handle the lower details of these connections

  5. Application API • Allows various task modules to be run to perform various functions • Conferencing • Paging • Directory Listing • Voicemail…

  6. Codec Translator API • Loads codec modules to support various audio encoding and decoding formats • GSM • µ-law/A-law • G.729 • MP3…

  7. File Format API • Handles the reading and writing of various file formats for the storage of data in the filesystem • GSMsf • .wav • H.263…

  8. Asterisk’s core (1) • PBX Switching • Connects calls together between various users and automated tasks • Connects callers arriving on various hardware and software interfaces • Application Launcher • Launches applications which perform services

  9. Asterisk’s core (2) • Codec Translator • Uses codec modules for the encoding and decoding of various audio compression formats • Different codecs available to suit diverse needs • Scheduler and I/O Manager • Handles low-level task scheduling and system management for optimal performance under all load conditions

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