Where is my T1/E1 card?!?!

In Cisco IOS, you have to use the "card type" command first, before "interface controller" will even show up as a valid command.

I'm using a UC520 box with a built-in T1/E1 port that is labelled "0/3" on the exterior of the physical device, so this was the command that worked for me:

card type t1 0 3

You'll then need to follow up with something like this:

isdn switch-type primary-5ess

!

network-clock-participate wic 3

!

controller t1 0/3/0
 framing esf
 linecode b8zs
 clock source line
 pri-group timeslots 1-24

!

Reference: http://www.cisco.com/c/en/us/td/docs/routers/access/interfaces/software/feature/guide/vd-t1e1_vwic3.html