What was found
TECH SERVICES FOLLOW UP REQUEST FOR MEDLINK SATCOM CALL FAILURE. PERFORM TROUBLESHOOTING AND UPDATE FINDINGS, PER DEFER TAB. GROUNDED-YES. PERFORMED SATCOM COMMUNICATIONS TEST, PER B737-800 AMM 23-15-00-730-801 - ALL TESTS PASS. ACCOMPLISHED CALL TO MEDLINK ON BOTH SAT-1 AND SAT-2 - MEDLINK REPORTED COMMUNICATION LOUD AND CLEAR. NOTE: AT NO POINT WAS A PHONE NUMBER FOR MEDLINK AS DESCRIBED IN DEFER NOTES STEP 1 DISPLAYED ON THE MCDU, NOR WAS THE NUMBER AVAILABLE WHEN THE MCDU HISTORY PAGE WAS ACCESSED, PER AMM 23-15-00-730-801. THE ONLY NUMBER ASSOCIATED WITH THE MEDLINK ENTRY IN THE EMERGENCY DIRECTORY WAS "201", WHICH WAS RELATED TO ITS SEQUENCE IN THE EMERGENCY DIRECTORY. CLEARS TSR DEFERRAL.