Avaya Oceana® provides callback functionality. If Avaya Oceana® does not find an available agent during a voice call, the caller is presented with the option to leave a voicemail or request a callback. If the caller selects the callback option, the caller is dropped from the call, and Callback Assist makes a new media-less call to Avaya Oceana® for routing to a suitable agent. After the agent answers the call, the customer is dialed and connected to the agent.