I have an 8th line that rings only to two extensions. Only these two phones have a line 8 button on them. All the other phones in the system use lines 1-7. When a call comes in to this 8th line, a receptionist picks up ok, but if she is still on the call and another call comes in on that 8th line, the call goes directly to her voicemail. I need that second incoming call to ring at her phone but at a lower ring tone. I know this works on our lines 1-7, which ring to a different receptionist. when the pilot line is busy, the calls rotate down the hunt group list but still ring to the same receptionist phone but at a lower ring tone. I need to accomplish the same thing on the 8th line but without a hunt group.