Abstract: A security broker (SB) that provides network based authorization of secure VoIP services, triggered upon attempted user access. The security broker (SB) intercepts a SIP transaction during session setup to transmit a network based security challenge to a SIP application attempting to access (secure) IP based services. A network based security challenge is transmitted to a participating SIP application on both the origination and termination legs of a SIP transaction. The network based security challenge prompts a SIP application to return subscriber authorization/authentication credentials (e.g. a username/password combination). If credentials returned by the SIP application are valid, the security broker (SB) authorizes the network to permit session completion, and access to secure IP services is granted.

Abstract: In one embodiment, a method includes associating a pluggable policy module with an application when executing at a session layer device within a session over Internet Protocol (SoIP) network. A policy service request can be received at the session layer device from an endpoint in communication with the session layer device. The method also includes defining a session control protocol signal based on a policy value sent to the application from the pluggable policy module. The policy value can be calculated at the pluggable policy module based on an input value associated with the policy service request.

Abstract: In one embodiment, a method includes associating a pluggable policy module with an application when executing at a session layer device within a session over Internet Protocol (SoIP) network. A policy service request can be received at the session layer device from an endpoint in communication with the session layer device. The method also includes defining a session control protocol signal based on a policy value sent to the application from the pluggable policy module. The policy value can be calculated at the pluggable policy module based on an input value associated with the policy service request.