Product Catalog: Avaya: Unified Communications Categories Meeting Exchange Mobility one-X Unified Communications Editions Avaya Unified Communications Editions are suites of communications applications including telephony, messaging, conferencing, and mobility, which are bundled to help organizations deliver the right applications to the right devices based on end user needs. Unified Messaging Avaya offers powerful voice and fax messaging platforms to connect single sites or multi-site global enterprises. Voice Messaging Send and receive voice messages when and how you want from the device of your choice whether using Octel, Intuity, or non-Avaya technology.