Octel Fax Feature

I was looking for some feedback from any users who are using the Octel 200/300 system and fax messaging. I am interested in: ease of use and administration, the amount of disk space required on the Octel Server (if 100 users supported), what PBX the Octel is interfaced with, what PC tools end-users are using to manage messages (we are looking at Visual Messenger, and your overall satisfaction with the product.

thanks.