A medical clinic. Five incoming lines, five call takers, ext 10, 12, 14,16 and 18. I would like them to take incoming calls one a time (as directed by the voice mail system, (push 6 to make an appointment)) spread over the five extensions. If all call takers are tied up with the five incoming calls then the sixth caller would get a busy signal. Should I put the five extensions (call takers) in a Hunt Group or Call Group? If one of the call takers does not answer the incoming line I'm not sure what I need the system to do.