I'm setting up a 5505 at a new branch and we get a /28 on the LAN side of the ISP router. The outside interface should be set to my first usable ip with a mask of .240, right? I've done this before ...

I've never setup one of these before, but a client requires it because their T1 provider made them think they were providing the CSU/DSU but now will not without an $80 per month fee for 'managed ...