ISDN Jack Installation

[Evan Sayer]

Hello-
My new house is currently being built, and I am wondering if I should 
install an ISDN jack now so that the SBC people don't have to do it 
once the walls are up and I actually want an ISDN connection.  What do 
the people who install it have to do to get is upstairs when they 
install it, is it difficult?  How is an ISDN line added, and can I do 
it myself?  Thanks.