Our messages on hold service works with any phone system, whether you require files or a streaming solution. Our streaming solution offers you the most features, flexibility, and ease of use. If your phone system can only take audio files we will produce your audio in whatever format is required. To see if your phone system is compatible with our streaming solution, view our up-to-date list of integrations https://easyonhold.com/integrations/. If you don't find yours listed here, be sure to let us know; we may be able to provide a streaming integration by working in cooperation with your provider.