As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BLUE SAT CALL LIGHT ILLUMINATED WITH A CHIME, THERE IS NO SAT PHONE PAGE ON THE MCDU TO ANSWER CALL. ACFT GROUNDED. PERFORMED SATELLITE COMMUNICATION FAULT ISOLATION TEST NO FAULTS NOTED REF TASK-FIM 23-15-00-23 -801. ACFT RETURNED TO SERVICE.