I'm glad to hear that the brain reboot worked out in your favor.
It sounds like you are looking at a label for a phone, not the phone system. The phone system is normally mounted on the wall somewhere - usually in the network room, or in a closet or basement. The VS is an off-white, plastic box. The APS is a larger gray metal box. Lastly, the ECS is a black metal box with a blue plastic front cover. Each one will have Iwatsu on the front of the box.
However, that still does not tell us which voicemail is installed. If it's the onboard voicemail card, then it is installed inside the cabinet and cannot be seen. The best way to tell if you have this voicemail is to log-in to the mailbox of your current administrator. See if you can "Press 4 for System Management." If you get that option, then you most probably have the Iwatsu voicemail. Once you press 4, follow the options to 'Change Class of Service' and choose which mailbox you want to make an administrator (mailboxes numbers are usually the same as the extension number). You can have more than one administrator, so your current admin box will not be affected.
Other than that, if your system is working well then it sounds like your programmer did a good job.
The only things to do would be to check the date and time on the voicemail to make sure that it hasn't slipped over time. Once you're in System Administration, you can press 5 to check and/or adjust the system time or press 6 to check the system date.
Good luck!
