Freeswitch Answering machine (Voicemail) detection

I have a particular project requiring expertise in Freeswitch, preferably with exposure to a Debian Linux environment. The key objective is to use Freeswitch for answering machine detection. The main requirement is to capture and analyze voicemails. We want to build a custom module or ready solution which can detect human or machine on the outbound dialer. The solution should work on any freeswitch version and without any licensing restriction. Please note, we have already used AVMD module and it just detects beep. We want to detect the machine or human from the initial screening of voice only. Skills and Experience Needed: - Solid experience with Freeswitch answering machine detection - Familiarity with working on Linux systems - Ability to effectively capture and analyze audio data.