For me it is the glance over to the next cubicle or next aisle to see if the person is on phone, heads down working, or is easily interruptable. I don't have re

For me it is the glance over to the next cubicle or next aisle to see if the person is on phone, heads down working, or is easily interruptable. I don't have remote technology to do that. The best I have is an IM which is a cognitive load for me and an interruption for them.