SIP Routing Engine :The Mavenir SIP Router provides flexible and configurable routing intelligence at the core of the VoIP network. It optimizes call routing to and from VoIP peering points via ENUM queries to determine the service provider and SRI queries to determine the address of the MSC serving the called party. SIP Routing Engine is essentially a BGCF deployed in IMS network.

Session Border Controller :A session border controller (SBC) is a device regularly deployed in Voice over Internet Protocol (VoIP) networks to exert control over the signaling and usually also the media streams involved in setting up, conducting, and tearing down telephone calls or other interactive media communications. Deployed in both interconnect and access modes in network.My Roles and Responsibilities includes :- Develop and improve the existing legacy UAC/UAS i.e. UA layer sip entity for high performance. By making use of C++ programming technologies. Improvement and optimization for HA replication of on-going calls using XDR encoding/decoding mechanism. Debugging signaling and media related issues SIP and H.248 Interworking. Design and enhancements. Run valgrind, coverity and Cpp Unit tests to ensure compliance.