This was just posted on the Official Site moments ago:

The new Combat Engineering Deployables are now on the Test server for you to play test over the weekend. We're still going to be tweaking things here and there so this isn't the build that will make it to the live servers, but it should give you a general idea how the new Combat Engineering Deployables will be used in game.

Head to PlanetSide.com to view this news post.