Do I really need NMS (Network Message Services) for Meridian Mail Rel.13 in order to have MWI (Message waiting indication) sent over VoIP Trunks? I have Sucession 3.0 with Signaling Server connected to BCM50 over VoIP trunks. I want to use Meridian Mail as a centralized voice mail for BCM. I have MCDN with CDP and can call back and forth between BCM and Meridian 1.