As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SATCOM INOPERATIVE DURING A MEDLINK EVENT. NO NUMBER WAS DISPLAYED AT BOTTOM OF SCREEN AND THERE WAS A CONTINUED BUSY TONE HEARD. ACFT GROUNDED. VERIFIED NO NUMBER & BUSY TONE, AFTER CYCLING THE SATCOM CIRCUIT BREAKER, THE SYSTEM RESTORED TO NORMAL. ACCOMPLISHED A VOICE TEST OUTGOING & INCOMING CALL WITH DISPATCH IAW AMM 23-15-00. MEL 23-18.