I have a hunt group with around 20 extensions. When the HG have incoming calls ringing in and someone is trying to IC to the HG, I get a buy message and the IC on the phone don't flash. Camp on is enable in the HG. Any idea why I am getting a busy signal when incoming call are ringing in and I try to IC the HG? I verified that not all extension were on a call. The HG is set up for Linear calls.

Thanks,

Ben