Hello, I'm a voip specialist with over 10 years of experience working on the TS/NOC departments of a US voip company; I can install, troubleshoot and customize many VoIP devices including softphones, ATAs, IP-phones and PBX systems like Asterisk/FreePBX. I read your project description and I can install, setup and secure your Asterisk system and your Ejointech device, I'm available through chat to discuss your project further, and get started. Thank you.