Hi I read a tutorial by Giovanni Maruzzelli. http://lists.freeswitch.org/pipermail/freeswitch-users/2014-August/107455.ht... These are my notes: Theoretically, Skype 4.3.x is demanding Pulseaudio audio output. I write theoretically, because I noticed that Skype works without a problem thanks to the ALSA library itself Apulse. https://github.com/i-rinat/apulse In connection with the question whether it is possible with the help of this library to connect Skype with FreeSWITCH using eg mod_alsa or directly mod_skypopen? Skypopen once used the ALSA API (version 1.0.x, as I recall). Under ideal conditions, it would be best to libraries based on Apulse do fork - eg library FsPulse, that sound from Skype headed straight to the driver interface Skyopen, eg / dev / skypopen. Unfortunately, I am not a programmer, and I do not know how to change the ALSA library API to OSS compatible with FreeSWITCH. But if someone could create such a library to integrate Skype - FreeSWITCH, it for many years to solve the problem with Skype, and potential problems with possible errors Pulseaudio, Pulse which are patched often even after two years, such as the famous error: 866 http://lists.freedesktop.org/archives/pulseaudio-bugs/2010-October/004195.ht... If the cooperation of Skype with FreeSWITCH to be stable and predictable, Pulseaudio in the middle of it is not in my opinion a good idea too. Also would be easier to control operation of Skype by FreeSWITCH, if the sound from Skype went directly to the server, without mediators, where the shape and function of FreeSWITCH developers have no effect. PS My natural language is Polish, sorry for bad English. Yours