Asterisk, SIP, VOIP, IVR, Call Center, HMP, Dialogic, Mobile App, Timers, TSR, Windows Service, Web services, Web Portal, NAT, PAT, VLAN, VPN, Socket, STDIN/STDOUT, Encryption/Decryption, Images/Files manipulation, Integration, Cross plate form applications Project Management, Hiring and staff Training HTML, Java, and Adobe Photoshop