Our office has a Key Voice system that was installed in the 90’s.
Dos 6.22, Dialogic D40, Corporate Office V8.5, connected to Toshiba phone system.

Has been in operation without problem, until this week.
It now boots up into “demo” mode and will only use one phone line.
To my knowledge there has been nothing changed on the system.

I have tried replacing the hard-drive with a ghost copy that I made 4 years ago.
I have tried swapping all the components (imaged HD, Dialog card and Key) to a different computer.
No Change.

That leads me to think that it is the security key (dongle).
Can this be fixed or is the EOL for this system?