Help! digital cable question?

Hey -
if anyone has done the switch over to digital cable (from regular cable), could you please tell me what the switchover entailed?

We're having it done in the morning, and for some reason the customer service person left my mom with the impression that only the cable box needed to be changed. It would seem to me, logically, that they'd need to run in new wires... but maybe not.

So, when you switched over, did they just put in a new cable box, or did they have to do some new wiring?

thaaaaaaaanks.