Dual forking is a way to leverage an existing investment in PBX infrastructure and deploy additional VoIP capabilities powered by Office Communications Server. Adding RCC to the dual forking configuration allows the administrator to offer more integration with the PBX. Users configured for dual forking have access to Office Communications Server’s functionality (such as outside user support, conferencing support, and click to call) along with the telephony capabilities provided by the PBX. This chapter covered the functionalities of dual forking, information on how the scenario works, the infrastructure needed, and how to configure dual forking. It also covered details about various scenarios in which the user experience differs from the Enterprise Voice experience.