Answering Machine Detection (AMD) for FreeSWITCH

This is an implementation of answering machine detection (voice activity detection) for FreeSWITCH.

Currently, in limited testing, we are able to get satisfactory results in determining what is a human and what is a machine. This has been tested with millions of machines across globe. This module supports async machine detection.

Building

To build this module, all you need to do is type make, but because it relies on pkg-config and FreeSWITCH, you need to point pkg-config to where FreeSWITCH is installed before building:

host$ export PKG_CONFIG_PATH=/usr/local/freeswitch/lib/pkgconfig/
host$ make

Sample Configuration

Just put a file like this in your freeswitch installation, in conf/autoload_configs/mod_amd.conf.xml

<configuration name="mod_amd.conf" description="mod_amd Configuration">
  <settings>
    <param name="silence_threshold" value="256"/>
    <param name="maximum_word_length" value="5000"/>
    <param name="maximum_number_of_words" value="3"/>
    <param name="between_words_silence" value="50"/>
    <param name="min_word_length" value="100"/>
    <param name="total_analysis_time" value="5000"/>
    <param name="after_greeting_silence" value="800"/>
    <param name="greeting" value="1500"/>
    <param name="initial_silence" value="2500"/>
  </settings>
</configuration>