This is an odd question I know. But I am babysitting a little girl, and her grandparents are coming to visit and I have to let them in. BUT i cant leave her alone to answer the door and her mum forgot to tell me how to buzz someone in when they call. How do I do this? Do I just press the pound key or what? Is it the same with most apartment buildings?

Thanks

omg people relax....shes napping hence why I am on the computer...shes only 6 months old and I dont want to wake her to take her downstairs...jeeeesus