I have a UC560 with four built-in FXS ports. I need them in a sequential hunt group. The ports are setup as user phones, as common area phones can't be added to hunt group. The problem is that when all four lines are busy, the fifth call doesn't result in a busy signal, but we need it to be busy. Currently when all four lines are busy, the fifth call just rings. How do I get it to busy out?
