We had the 221 set as default prime. We set up the autoattendant and removed the 221 set. Our system is set to have the programming move with the set due to the amount of shuffling we've been doing. We need to get the Zero-to-attendant back, but the 221 set is missing. How can I set another ext to prime without it ringing at every call? I only want it to ring whan Zero is hit. Any ideas?