We have been using PerfectServe answering service. It is a computer based system and totally eliminates the human element. The cost is $99/month for each full time user. After going to a computerized system, you will never return to one that employs a live person answering your phone. Several friends also use PerfectServe and we are all thrilled. Their website is perfectserve.com. They also have a free smartphone app. (they do offer the referring physician a small one time discount on his monthly bill).