I have been asked to set up a phone system and voicemail that was won at auction. We received no manuals, or software.

I have successfully set up the switch (Triad[?] Part 5000-00, Basic KSU) but I am having trouble with the voicemail. I have found some documentation for a like system (https://wedophones.com/VodaviManualsLead.htm) but I still am unable to 1) get the switch to recognize the voicemail, and 2) change the "PBX" type to the appropriate type. It tells me that the PBX Configuration File does not exist.

Any light you can shed, would be greatly appreciated.