I have a Definity G3si ver8.3. I've been pulled in many directions with IP softphone that I am not sure which is fact anymore. I have a software dialer which I intend to use for a group of users. I was told from the dialers manufacturer that I could use the IP softphone for call control to a 6408D+ handset in telecommuter mode. My Definity is a standalone PBX and it does not sit on the LAN. I need to know what is exactly needed to get a softphone working on the Definity. My telco vendor says I need a major upgrade to the Definity because of its release. Is this true please outline the items needed to get the Avaya softphone working. The dialer is TAPI compliant any other suggestions? Thanks...