Is there really no way to turn off the phone?

I have a Polycom VVX 250 phone. My office is in my bedroom (I know, not ideal but not the topic at hand). I want to turn off the phone at night so that a) there is no light coming from the display screen and b) the voicemail red blinking light turns off (even if I have unlistened to vms). Is there a way to do this without unplugging the phone? I've tried everything but there doesn't seem to be. Any help would be much appreciated.