Key Responsibilities Include: • Responsible for test planning and execution of RG (Residential Gateways) certification testing for consumer services • Identify key issues, open defects, work with the vendor for a resolution, validate and resolve the defects once fix is available in a labs-based environment • Understand and able to configure voice gateways with registrar server and troubleshoot connectivity issues • Able to read and analyze debug VoIP logs and open bugs with vendors • Provision and configure VoIP lines on RGs (Residential Gateways) • Thorough understanding of IP based network systems and protocols • Extensive knowledge of SIP protocol and related network components (Gateways, SBC, Proxy). • End to End call flow testing of VoIP services which may require coordination with other teams (Domestic and International) • Developing test scripts and plans; Perl and / or Shell scripting experience is a plus • Provide Lab environment test support • Deep understanding and debugging capabilities for SIP, RTP and ,WireShark traces/captures • Test SIP and RTP call traces and SIP call flow • Attend project meetings to review system and test requirements • Responsible for Tier 4 problem and troubleshooting/diagnosis and resolution • Provide production and escalation support to Operations and Service teams