My experience with Livingston PortMasters was a great
experience.
 PortMasters, Cisco 2511 w/Octopus cables, and lots of US Robotics modems
 encompassed my early ISP experiences.
 If I recall correctly, Livingston came up with the RADIUS authentication
 protocol, and open-sourced it for us all to enjoy.
 Lots of fun with RADIUS and TACACS in its various forms.  I have not had the
 opportunity to work with the DIAMETER protocol yet.
 Thanks for sharing.
 Jerry 
I have a few PM-25E fan out cables and maybe a PM-25 that could probably
use a home!
--
Ethan O'Toole