Hello, my name is Nenad Rajkovic, and I am a VoIP and network technology professional with 15+ years hands-on experience in telephony (analog, ISDN, VoIP, SIP) and IP networking, working on positions such as Pre-Sales Engineer, Tech Support Engineer, Certified Tech Trainer, IT Consultant... Beside Open Source solutions like Asterisk, FreePBX and my favourite Linux distribution Parrot OS, here are some of the areas of my expertise:

· Patton Electronics Voice Gateway/Session Border Controller portfolio

· Avaya (Media Gateway, PBX)

· Networking (Switching/Routing)

· Unified Communications

· 3CX PBX (Cloud/On-premise)

· Grandstream Media Gateways

· MikroTik Technologies

· Telcobridges (TMG Media Gateways/Pro SBC)

· AudioCodes (MediaPack and Mediant Media Gateways)

With my courses I want to make my students life easier when it comes to VoIP and SIP topics, my first course "SIP Analyzing & Troubleshooting Masterclass" is out and ready, l hope you will like it and find it useful