Originally Posted by d2thez
It is a patch type RJ-45 cord used, but I am not sure if you consider this to be ethernet or T1.
OK if you're extending a T1 then the word "ethernet" should not be entering the discussion at all. I think you're thinking of the cat6 cable as an "ethernet" cable. This is not correct terminology because the same type of cable (cat5 or cat6) can be used for T1 and ethernet. I think you confused your parent company by saying "ethernet" because if they had known this is a T1 they never would have suggested a switch in the middle.
OK now that we've got that cleared up, the 400 ft length is not a problem. As a matter of fact, with the Cisco CSU's you can go over 655 ft using the "cablelength long" command.