The system is a DK40. When trying to do a Intercom #30, I get the error "All call busy". I reset the KSU thinking something was locked up, but I still had the problem. Can the system be configured so that none of the phones are in a page group (program *30)? Would I get thie error? Could I also be getting this error if All Call Page Allowed wasn't enabled on all phones (program 31/LED 10)? :shrug: