I'm using a Merlin Legend in my home, 3 lines appear on all MLX phones. I also want to add a few Trimline and Bell System Designer phones, so I'm adding the 016 Basic Telephone w/ ring gen module. So how do I program the single line sets to ring on a specific CO line? And 2nd, when a single line phone user dials 9, where do I do the programming to assign a CO line? I'm not using any pooled lines, in Keysystem mode. I have all the manuals, but so far haven't found the section that explains my 2 questions. Thanks for any help!