Forgive me but I just had a basic question about hardware.
Our network was designed and implemented (before I got here) by a CCIE.
All branches have MPLS connectivity and 2800 series routers.
At each site, he used a seperate CSU/DSU.
I don't know why he did that when you can have a WIC T1 CSU/DSU for a cleaner connection and one less thing to supply power to.
Is there any technical reason to do that that I am unaware of that makes a better or safer or more efficient connection?