I have 3 extensions I previously programmed for something - and this something could have been just for learning purposes, but I can't figure out what they were for. Does anyone have an idea why I'd have 3 extensions programmed as 5220 Dual Mode phone on a Mitel 3300?

Last 4 digits of mac addy are the extension number. I can't remember if these may have been Teleworker examples or something else, but I remember that particular phone being used for some feature or something.

Help?

Figured it out - they were outgoing lines for Mobile Extension (something we haven't used yet). I was able to reassign them to different extension numbers.