Yes, you can!

First, go to your door station and carefully remove its front cover. Then, press the key set button four times (this is a small button in the top-left of the device). Then press button 1 - press it once to set the ring-back to continuous, twice to set it to a single ring-back, and three times to turn it off completely.

Wait ten seconds, and the door station will exit itself from its programming mode and return to normal usage.