I am trying to integrate a Unity Voice mail system into a Nitsuko 704i. Has anyone accomplished this before? If so, how have you done this?

Also, here are a couple of questions that I am trying to get answered, but I am not Nitsuko certified so NEC will not talk to me.

1) Does the Nitsuko switch support QSIG? If so, can it be configured for that?
2) If no QSIG, what protocols does it support? These need to be cross-checked w/ DMG1000 for common ground.