NEAX 2000 PBX, old voice mail system ("Voice Support"?) is dying. I want to replace it with an Innovator PC-based voice mail, however I don't think the existing MCI connection will work properly with the Innovator as it's designed to support API connection only with Panasonic PBX. So it has to be analog integration. How are the follow along digit strings programmed (so that the PBX sends digits to tell the voice mail which mailbox to go to?)