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Ribbon Communications Centralized Policy Service (PSX) 

The Ribbon Communications Centralized Policy Service (PSX) delivers the call routing and session policy management for Ribbon’s industry-leading session border controller, media gateway, and Class 5 access solutions. PSX’s unique master/replica softswitch architecture provides a single, central point of provisioning for all routing and policy in either a service provider or enterprise network, greatly simplifying network management while offering unmatched scalability. Supporting a wide variety of signaling standards, the PSX server can also be deployed in heterogeneous networks as a centralized call-routing engine using SIP proxy server, SIP redirect server, H.323 proxy gatekeeper, and ENUM server capabilities. It also functions as the Border Gateway Control Function (BGCF) in IMS networks.