What is Speed Lockout on a SUNTOUR fork?
Remote lockout means that the fork has a "remote" lever that is installed in the handlebar. 

My fork is a XCR RL from 2011 as well and pressing the blue lever locks the fork, pressing the black lever on top of the blue unlocks it. This is a XCR from 2011 as well.

You can see the remote in the following picture:



If you have a knob with speed lockout you should have a fork similar to SF11 XCR LO 26". If your fork has rebound adjustment then it's a XCR LOD. You'll have to look that up in Suntour's site since I can't post more than one link.

Browsing Suntour's Tuning Base may give you additional information.