Hi, I've installed FreeSWITCH inside VirtualBox. Below I list versions of software that I use: Host OS: Linux Mint 18 Sarah Host IP: 192.168.8.100 Guest OS: Debian GNU/Linux 8 (jessie) Guest IP: 192.168.8.101 FreeSWITCH: FreeSWITCH (Version 1.6.14 -23-e460bf8 64bit) Chromium: Version 55.0.2883.87 in /etc/hosts: 192.168.8.101 c1.flexy.az I configured FreeSWITCH to be multi-tenant and serve configuration through xml curl module. When using Linphone to connect to FreeSWITCH everything works perfectly. Now I try to use Chromium + XML RPC using SIP JS javascript library but there is no sound. On the FreeSWITCH side call procedes normally but on the client side there is no sound. I have searched online but could not find any solution that resolves the problem. FreeSWITCH log is here (top parts of the console got out of buffer, but it is understandable what is going on): http://pastebin.com/HK70AEnX Chromium log: http://pastebin.com/7n763mEd Wireshark: http://filebin.ca/3AW3of2XdBLq Any help is very highly appreciated. Best Regards, Rovshan