I recently wrote up an article on creating your own terminal server. I'm building my home lab to study, and, while I have a Cisco 2500 router to use as a terminal server, I didn't want to spend the money on the octal cable. So, since I'm already using my Linux box as a Dynagen server, I figured I can set it up as my console server as well, for a much cheaper price.
Create your own serial terminal server
If you ever find the need to be able to console into multiple devices in a cheap way, using SER2NET on a Linux-based system is a good way to go!