Provide tier 3 engineering and support for voice and communications networks. Configure, develop, patch, STIG, enhance, and add features to Cisco VoIP system to include Call Manager, Cisco Unity, Ribbon VX900 devices, Instant Message and Presence and Teleconference Bridges.Develop configurations and methods for Cisco Unified Border Elements, Session Border Controllers, and other network devices that use Session Initiated Protocol (SIP) to connect system to external voice systems.Develop configurations for SIP connections between the VoIP network and other customer networks including Asterisk networks, Call Manager Express, SRST, and other Cisco VoIP networks.
