We did have an outside line that went to the DID for built-in modem. For now I redirect that on the gateway that sits between this PBX and the provider...I redirect it to my IP PBX and terminate the call. DISA appears to be disabled on trunk, so I guess I don't have to worry about that.

We have the IVP8 VM cards, how can I look for the transfer to the modem? How about authentication, how is that handled for that modem connection?