After years of frustration and living with sub-par answering machines, I’ve finally decided to create my own. Sure, it sounds like a daunting task, but thanks to Mark Spencer of Digium, Inc. we now have a fantastic piece of software to work with called Asterisk. Asterisk is a complete PBX system and well known in the VoIP world. While it is admittedly overkill for the task of a simple answering machine, it met my goals… [via] Link.
HOW TO make an Asterisk answering machine