High Quality Content by WIKIPEDIA articles! AUDIX (AUDio Information EXchange) is a Voicemail server intended to be used with Lucent/Avaya PBXes. It features many integrations with Avaya`s PBXes, such as capturing the extension of the calling party and pronouncing that person`s name (if they`re also an AUDIX subscriber and have recorded their name on the system) when announcing the attributes of a message, automatic identification of subscribers when they are dialing in to retrieve their messages, and activating and deactivating MWIs.