YATErl is a simple Erlang binding developer by Alca Società Cooperativa ([http://alcacoop.it]), to create YATE-based VOIP applications using the powerful feature of the Erlang language and OTP framework. YATErl is designed as a standard OTP application so you can create an OTP release for your application which include and use it to implement a VOIP application.

YATE is a VOIP Application Server developed by Null Team ([http://yate.null.ro]), coded in C++ using message-passing techniques, and actually scriptable in PHP and Python.

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YATErl is composed by a small number of registered processes and a couple of "almost" side-effects-free modules:

• yaterl_app: manage start/stop yaterl supervised tree
• yaterl_sup: supervise yaterl registered processes

• yate_stdio_connection:
  • connect to yate on stdio
  • register to a yate_control_srv
  • send binary data to yate on stdout
  • receive binary data from yate on stdin
  • route binary data to the registered yate_control_srv
• yate_control_srv:
  • manage a yate connection
  • send / receive binary data from an active connection
  • encode / decode erlang term <-> binary yate event format
• yate_event_mgr:
  • register configured autoregistering yate event handler modules
  • send / receive yate events decoded as erlang records
  • register / recall processes which waits for a reply
  • route watched yate event to registerent yate event handler modules
  • send a wait for reply installed yate event to registered yate event handler modules

• yate
  • High Level abstraction API
  • manual watch/unwatch/install/uninstall commands
  • utility commands (setlocal, output)
  • message exchanging commands (send_event [sync or async], wait_for_event)
• yate_event
  • High Level and Side Effect Free yate event manipulation
  • create new yate events commands
  • yate event type checker commands
  • yate event attributes setters/getters
• yate_message
  • High Level and Side Effect Free yate message manipulation
  • create new yate events commands
  • yate event type checker commands
  • yate event attributes setters/getters

• yate_encode: encode yate event from erlang record to binary data
• yate_decode: decode yate event from binary data to erlang record
• yate_event_handler: mnesia backend for yate event handlers registering

• sasl: error and progress logging
• mnesia: registered yate event handlers modules backend
• kernel / stdlib