The sim I am at has a Landing Point.

I was teleported by a friend from a skybox to the ground, when I accepted the teleport it said it could not be completed because I was too close to the destination.

The landing point also has a teleporter which is an item you can sit on and it takes you to the ground. I managed to sit on it, but no llDialog opened so it was useless.

I tried to teleport to my Linden Home and then accept another teleport, but I still was sent to the Landing Point instead of the location I wanted to be teleported to.