ahh im too lazy to write it down
but heres a site that explains it pretty good :
http://collective.valve-erc.com/index.php?ent=trigger_teleport
you just need to make the simple teleport from this tutorial
EDIT : aww more explaining my conscience won't let me not to,
trigger_teleport brush based entity ( make a brush and then Ctr+T to make it an entity and select trigger_teleport from the list)
info_teleport_destination point entity ( just select it from you entity list -no brushes involved ) if you don't have it in your list then download
expert.fgd from superjer's tutorial page
http://www.superjer.com/learn_adv.php
and follow the tutorial to know what you have to do with it once you downloaded . this gives you aces to all the entities in valve hammer editor
Wtf is that ? its a bird ! no its a plane ! amm maybe its a plastic bag . NO ! its
SUPERJER ! the greatest super hero ever!