I am certified Asterisk/3cx/SIP/AWS/Firewall Engineer. Expert in Vicidial/Vicibox/Goautodial/Freepbx- 1-Inbound outbound configuration 2-Skill Bases inbound Routing. 3-Predictive Dialing 4-Ivr voice broadcasting 5-IVR Tree. 6-Press-1 Survey Campaign. 7-VOIP,SIP trunk,GSMGateway(DINSTAR),E1,T1 Configuration.