Dear Forum Manager, We are had two system PBX MD 110 BC 9, each system consist of 8 Lims,each lims 2 GJU-L connect to GS,total capasity 3700 LUs,56 DID, 120 trunk lines outgoing to PTT, after upgrading software BC 6 to BC 9 in GS both of them always Alarm E5 and E6, can someone guide why this happens and what is solution for this problem, Thank you.