We have BCM50s out at our branches. We have three T7316 phones at each desk. We have them programmed with two intercom keys. We have four analog lines which are assigned to each set. The analogs were changed from appear only to ring & appear. Now, when a person is on their phone and the external number is called, the call goes directly to VM. We thought because of the two intercom keys, it should ring and not go directly to VM. Can someone please help, we're not sure what we are missing.