I have had hand-on experience of working with VoIP and SIP telecom products.
Under the IP cover I have worked on Proxy Server, Registrar, Gateways, Routing Protocols. I also have the knowledge of TCP/IP,RTP,SDP and all the protocols that relate to VoIP-SIP (IETF and 3GPP defined). Have been through complete SDLC cycle, used Agile Methodologies, Created reporting documents.
Have also been as a Support Engineer involving meeting deadlines, maintaining SLA's and high customer satisfaction levels.