Inter-enterprise collaborative environments and applications enable users to utilize and manage voice, data and video services on a common IP-based network. As voice moves from its traditional separate network to having both user and trunk connections traverse the corporate IP network, the demands for uptime and quality of experience increase dramatically. When video-over-IP is layered onto the same infrastructure, the challenges become even greater as video and traditional data traffic can overload links and potentially degrade sensitive VoIP traffic. Furthermore, when all three services run over a single infrastructure, any failure can wipe out all communications. This paper addresses the challenge of how the newly converged network can be effectively deployed and managed for mission-critical, real-time services. We respond to this challenge by suggesting a model with the appropriate optimized planning, design, and further maintenance.