There is one important caveat when plugging an RJ11 into an RJ45. The edges of the rj11 plug may bend and damage the outer wires in the jack. It won't be a problem until you convert that run over to data, and can't get connectivity.
For that reason I will stick to terminating it rj11, and replacing the keystone when converting a run to data.
In the closet, the cat5e is left long, and punched down on a 66 block for phone. If I want to make that a data run, I pull it off the 66, punch it down into the patch panel and test.