I don't know Octel VM, but with my Centigram (now Mitel but not as good!!) I would build a "distribution list" for VMbox for virtual to "distribute" the message to the VMbox of the prime line (3040). The VM would then light x3040's light and a copy of the message would be in x3040's box. I would set the message retention to a very short time (1 or 2 days) so the vertual's VMbox would never fill up. If this is not desireable, I have used "message delivery" feature to dial the virtual (or any number I choose) and when answered the VM will say "Hello mailbox xxxx, please enter your passcode". Thats how I notify analogs and off prems.