The CallVisor LAN (CVLAN) service is a C/C++ based API that enables applications to exchange Adjunct/Switch Application Interface (ASAI) messages with the AE Services server. CVLAN provides third-party call control capabilities, such as controlling specific calls or endpoints, routing of incoming calls, receiving event notifications, invoking Routing Core Server features, and sending requests to Routing Core Server for call information. CVLAN is an Avaya-specific protocol that you cannot use for application development.