Can someone verify the steps to transfer a call from Trunk to Trunk (Both Loop Start) and for the transferring party to drop out of the call allowing the 2 outside party's to continue. Here is the instructions that I have:

A Trunk-to-Trunk transfer can be established by the following operation:
1. While talking to an outside party, press Hold.
2. Access a second outside line and dial the desired number.
3. Press Transfer to complete the Trunk-to-Trunk transfer.

Program 14-01 Trunk to Trunk Transfer is checked
Program 20-11-14 is not checked
Program 20-11-21 is not checked

Is there something that I am missing? Thanks