Our on hold service works with any phone system, whether you require files or a streaming solution. While our streaming solution offers you the most features, flexibility and ease of use, some phone systems can only take audio files at this time, so 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 here. 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 carrier.