Try our Documentation Portal! Everything you ever wanted to know about Tellabs Optical LAN can be found here . Stay informed with the Tellabs Knowledge Base Portal This video is part 1 of a series that will define how to set up the system to use NAC in conjunction with Radius Authentication and to define the services or “policy” on a user port.   The topics covered in this training video include…an introduction to the concepts involved in radius Radius and an explanation of the function of the Tellabs NAC profile application.