I have a UCM6202 Appliance and have set it up to work in my grandstream environment in lieu of freepbx. While I like the UCM itself I am having issues Getting an Axis 8105-E Door Station to work correctly with it. If I set the door station to call a group the phones ring once then instantly hang up. if I set it up for paging/intercom it will ring until a phone picks up, but after a phone pickls up it keeps ring on the remainder of the phones for quite some time. I tried setting this up on freepbx and it works fine, I was just wondering if anyone has any suggestions.
Thank you in advance