Reasons for COMMUNICATION LINK FAILURE – MAB:

COMMUNICATION LINK FAILURE – MAB: 
a) MAB CIRCUIT BREAKER DEFECT 
b) VCU DEFECT 
c) SVJ, SV2 CARD DEFECT 
d) CPZ CARD DEFECT 
e) CRJ9, 10 COUPLER DEFECT 
f) COMMUNICATION CABLE DEFECT 
g) COM CARD, SIG DIST BOARD DEFECT