I have also ran into this recently, trying to set up an "answer button" for a cordless from a deskset. I ended up using "group pick-up". The "appear only" or "appear & ring" shouldn't make any difference, the V/M is transfering through "intercom". You should have 221 set not to ring anyway because the V/M is set at 0 rings, you would otherwise always get that annoying half ring on the reception phone. Actually, if you have CI cards, you will want to set the V/M to answer after 2 rings on each line so that call display info is allowed through.
