- CANBOX develops, distributes and operates the Unified Messaging Platform CANBOX - in America, Europe, and Asia. CANBOX Systems is a worldwide provider of Unified Messaging over Internet Protocol (UMS over IP). Our CANBOX UMS converges traditional communication methods (eMail, voice, fax, paging, SMS, etc.) and combines them into one Internet repository, accessible via a wireless or wireline ...www.canbox.com