a1, all you need in the TD 816 is one field.
Field 117. enter 1 port #
the TVS50 receives 2 voicemail ports off 1 TD816 port.
It rides on the 2nd pair so you need a 2 pair linecord.
plug the linecord into port 1 of the TVS.
Have you talked to the TVS50 through the laptop?
MrG