Hi all. We have NEC SL1100 phones. My co-worker's personal line has been blinking for a week straight. It's also blinking on all of our phones. Our phone guy doesn't know how to make it stop. Can anyone walk me thru the steps to stop it from blinking? Is there a series of steps I can perform on her phone to stop the blinking? I'm so sick of seeing it blink all day on my phone.