Hello Sir, I'm a voip tech with over 10y experience working for a US voip company on the level2/NOC department; I can install, troubleshoot and customize many SIP devices and applications such as softphones, ATAs, IP-phones and PBX systems like Asterisk/FPBX. I read your project description and I can help you build your inbound/outbound SMS solution. You may contact me at any time so we can discuss this further.
Thank you.