Notes about the MMI file extension:
To open this file type, a required software must be installed. Without it you only see a Windows message "The following file cannot be opened
" (Windows 7) or "How do you want to open this file?
" (Windows 10) if you double-click the file. There click on "More apps"
and choose a suitable software to view such files on your PC or from email attachments.
The MMI file type is primarily associated with 'Media Processing Server Studio' by Nortel Networks. Media Processing Server Studio is a graphical software tool that is used to create, edit, and manage audio elements of menu prompts in both the Voice Processing Series (VPS) and Media Processing Server (MPS) environments. This product used to be known as Peristudio/PeriProducer. Extensions used by it for IVR vocabulary file manipulation include .MMI=Index, .MMD=Data, and .MMF=Reference Name.