Answer
Before making changes, print out what you have in case you make a mistake

Required values on the TN

CLS: FNA

FDN: nnnn - The DN where calls should ring upon no answer

(Analog) FTR FDN nnnn - The DN where calls should ring upon no answer

Your DN must be MARP on your TN

Note:  The FDN instructions for a call are obtained from "the originally dialed DN".  This means if you CFW to another person, calls to your DN will still FDN to your TNs FDN value - not the FDN of the person you CFW'd to.

What if you want to Forward No Answer additional "steps"? Use CLS SFA

If you want "Call Waiting" calls to FDN, set the LD15 RDR_DATA OPT to CWRA

Link to this page:  http://www.ghtrout.net/rdr/fdn.html