A.W.
I think they are plenty old enough to understand that they need to be quiet especially when you are on the phone. I work about 20 hrs a week from home on the computer and making phone calls. My kids are almost 5 and just turned 7. When I know I need to make some phone calls, I get them going on something usually upstairs away from my office like legos or a movie. If they have already been acting up that day, then I separate them in each of their rooms before I make the calls to eliminate the fighting and running around noise. It is also so important to make sure that even as they get older, to spend quality time with them everyday. My kids behave so much better when I'm on the phone if I have just finished playing a game with them or something. Then they feel like they have had some time with me and they give me time to work. Same thing with cleaning the house. Time for kids, time for work, time for kids, time for the house, time for kids. If most of your time is not being spent with your kids, then your doing something wrong and they will never behave for you.