The 206 basic partner should see the lines when you power it up. Power the system down and wait a few minutes and power it back up. It automatic assign the lines depending on the number or line ports you have.
Check out this link https://www.support.avaya.com/comsys/ they have all the options you can program on the basic partner. Hope this help

[This message has been edited by dialtone (edited 10-06-2001).]