Hello, I'm a VoIP specialist with over 10 years of experience working on the TS department 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 certainly build your VoIP system for your sales team, I'm available through chat to discuss your project further, and get started. Thank you.