Answering every call not only interrupts your work but a lot of calls are from telemarketers. Despite a cell and 2 land lines on "do not call" lists, some still get through. Luckily, for some reason, my phone system makes a different sound when it's a telemarketer and I ignore it. Hopefully they'll eventually give up!
Lynne
P.S. The phone system records the number of any call so I can trace it to see who/what it was.