Hello, I'm a voip specialist with over 10 years of experience working on the TS/NOC department of a US voip company; I can install, troubleshoot and customize many SIP devices including: softphones, ATAs, IP-phones and PBX systems like Asterisk/FPBX. I read your project description, and I can help you with your call centre solution, I understand you wish to install Asterisk with FPBX GUI interface in front of your UCM device so you can easily access your CDR records and filter by disposition as well as create a custom call flow to send a SMS to the caller when nobody picks up. Let me know if this is exactly what you're looking for or just ping me to share more info on your exact requirements.
Thank you.