CallClerk is an advanced phone assistant that combines CallerID features, an answering machine and call processing features. It can notify you of new calls via tray pop-up, flashing keyboard light or email message, allowing you to receive notice of new calls, even if you are not at home. The program can also block callers and offers distinctive rings based on the CallerID, as well as integration with your Outlook contacts. Other features include faxing, outgoing calls, uploading of call history to a web page, reverse phone lookup via online sources, network reporting, browser integration (for outgoing calls) and more. A very complex phone assistant with tons of features at an affordable price.