Try this it may work
Log in to the administrator MB 9997 then instead of hitting the hidden prompt 9 for admin hit 7 and it should tell you the version (i think)
Connect via hyperterminal and a null modem cable to the serial port on the side of the unit. 1200-N-8-1, no flow control. Hit return. The password is the serial number of the unit. The menu display will give you the release. You can also pull a configuration report which will tell you at a glance how the auto attendant/submenu/announcements/mailboxes are set-up
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