You know how if you're a member of a hunt group (or member of a hunt group member extension list that is a member of a hunt group), how if a new call rings to the group, you're already on a call, and the audio momentarily interrupts and the display shows the caller id of the new call? It's a bit like the call waiting notice from the phone company. Is there a system or extension flag to get rid of this? Never turned it off before but I experienced it for myself today at a high volume site and it's quite annoying.