I have 10 years of experience in asterisk, IVR solutions, freepbx, 3CX, Issabel, Vitalpbx, Vicidial, Bicom, Goauto dial, Elastix, Incredible pbx, fusionpbx, freeswitch, A2billing, ASTPP and voip solutions and security like iptables, intrusion prevention etc.
please check my profile for details